hassle vs unpleasantness

hassle

noun
  • Trouble, bother, unwanted annoyances or problems. 

  • A fight or argument. 

  • An action which is not worth the difficulty involved. 

adj
  • hassling; hasslesome 

verb
  • To engage in a mock dogfight. 

  • To pick a fight or start an argument with. 

  • To trouble, to bother, to annoy. 

unpleasantness

noun
  • An unpleasant behaviour, occurrence, etc. 

  • The property of being unpleasant or disagreeable. 

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