How many words and which ones we need to learn

There are milions of words in English.
So, effective strategy is require.
We need to learn the 3,000 most flequent words first.

the most common words cover wide range of sentences.
2,000words=80~87%
3,000words=90~95%
Low frequency=2%

If we know these 3,000words completely, rest of words in the article can be guess by meaning.

Then, students should learn the word they're interested in.
For example, university students must know academic words, Caleb needs to get many words of baby and so on.

05AA020 Narumi Ota