foresight vs thoughtlessness

foresight

noun
  • The ability to foresee or prepare wisely for the future. 

  • a bearing taken forwards towards a new object 

  • the front sight on a rifle or similar weapon 

thoughtlessness

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

  • disregard for other's feelings 

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