How many new words should I learn per day?

The number that matters is the one you keep

Ten words a day sounds modest, but it adds up: in a year that is over 3,500 words met, and even if only a part of them become solid, that is enough to move from beginner to a comfortable intermediate level. A plan of thirty words a day that collapses after two weeks produces far less.

Consistency matters more than volume because memory depends on reviewing at the right moments. A word you meet today needs to come back tomorrow, then in a few days, then in a week or two. Miss those moments and you are learning it again from scratch.

Why more is not faster: the review debt

When you add new words, the reviews they create keep arriving for weeks. After a month of steady study, most of your daily time goes to reviews, not to new words. That is the point: reviews are where the learning happens.

A rough way to budget your time, assuming about half a minute to learn a new word and around ten seconds per review:

These are estimates, not rules — your speed depends on the language, the words and your reviewing tool — but the shape is always the same: the review load grows with every word you add.

Not all words are worth the same

Ten everyday words do more for you than ten rare ones. A small core of very frequent words makes up most of what you hear and read, so early on, learn the words you will meet again and again: common verbs, everyday nouns, question words, numbers, time expressions.

How much you need to understand comfortably is well studied for reading: research by Hu and Nation (2000) found that readers need to know about 98% of the running words in a text to understand it without help. That is why frequency matters so much — the first few thousand common words cover far more of a text than the next few thousand.

Some words are also cheaper to learn than others:

• Cognates — words similar to ones you know — are almost free: hotel, información, Problem, informatie.
• Concrete nouns with a clear picture are easier than abstract words.
• Words with several meanings or tricky grammar (verbs with prepositions, irregular plurals) take more time.

So “ten words” is not a fixed amount of effort. Ten cognates are a light day; ten irregular verbs are a heavy one.

What counts as “learned”

Knowing a word has layers: recognising it when you read it, understanding it when you hear it fast, remembering it when you need it, pronouncing it, and using it with the right partner words (make a decision, not do a decision). A word you can recognise on a card is a start, not the finish.

That is why it helps to learn words in short phrases or sentences rather than alone: a cup of coffee, to catch a train, ik heb honger, tengo frío. The phrase carries the grammar and the natural partners with it.

A practical plan

1. Pick a daily number that fits your real time. Start at 10 if unsure.
2. Choose by usefulness: frequency, your job, your daily life, your exam.
3. Learn each word inside a phrase and with its audio.
4. Review before adding, every day, even when short of time.
5. Use the words: once a week, write or say a short text that uses twenty of the week’s words.
6. Adjust after two weeks: if reviews feel endless, lower the number; if they feel light and your recall is good, raise it a little.

When to go faster or slower

Go faster for a few weeks before a trip or an exam, when you have extra time, or when the words are easy (cognates, a topic you know well). Go slower when your reviews are overflowing, when you are learning a language far from any you know, or when you notice that new words do not stick — that is a signal to consolidate, not to push.