exacerbate vs make nice

exacerbate

verb
  • To make worse (a problem, bad situation, negative feeling, etc.); aggravate; exasperate. 

make nice

verb
  • To be friendly or conciliatory towards another, often in the context of maintaining good relations or resolving a conflict with the other person. 

How often have the words exacerbate and make nice occurred in a corpus of books? (source: Google Ngram Viewer )