The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

SUGGESTION in my SUGGESTION box
you installed without asking me
The Big Bang Theory Season 5, Episode 16

SUGGESTION in my SUGGESTION box
you installed without asking me
The Big Bang Theory Season 5, Episode 16

A SUGGESTION box.
The Big Bang Theory Season 5, Episode 16

- My lord.
- Testifying against me wasn't a SUGGESTION.
Game of Thrones Season 4, Episode 3

And one other SUGGESTION,
if you'll allow me.
Game of Thrones Season 8, Episode 2