Definitely, to learn new terms and new expressions for a new language - apart from exceptionally gifted learners - it always takes a process, and, somehow, a development of steps.

First, you know a new word one day, days later you don't remember it, another day it reappears in a text, in an exercise, ... and you don't recognize it, and then - let's say - the fourth day, you start to remember the word and its meaning.

The same process happens again in the same way to learn for you to use a new word: you try to use it while speaking, but it doesn't come out, and a word you know previously comes instead of the new word. And the same happens the second, the third, ....... and finally, one day you use it naturally.

You have to be patient, and you have to be dynamic to activate this form for your learning process.

This always happens in learning any language.