foolishness vs thoughtlessness

foolishness

noun
  • The state of being foolish. 

  • A thing or event that is foolish, or an absurdity. 

thoughtlessness

noun
  • heedless disregard for the consequences of one's actions 

  • disregard for other's feelings 

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