[bluquark]

Thanks!

> unless my textbook omits the kanji because of it being rarely used in the real world, as for some words

I have found this usually proves to be a mistake, textbooks and dictionaries pretend that you need far less kanji than you actually do. Lately I started to mine Anki words from conversations on Japanese twitter and I discovered that everyone casually throw around all kinds of kanji that are not on the Jouyou list and in words every textbook insisted were primarily kana.

I think it might be because modern IMEs have made it much easier to casually use rare-ish kanji. Technology has expanded the range of everyone's recall and writing speed, while the textbooks are still reflecting the world of 20 years ago.