cross-purpose vs foolishness

cross-purpose

noun
  • A contrary or conflicting purpose or understanding, especially an unintentional or misconceived one. 

foolishness

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

  • The state of being foolish. 

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