hardship vs mistreat

hardship

verb
  • To treat (a person) badly; to subject to hardships. 

noun
  • Difficulty or trouble; hard times. 

  • A burden, a source of difficulty that could impose a barrier. 

mistreat

verb
  • To treat someone, or something roughly or badly. 

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