ascribe vs thank

ascribe

verb
  • To attribute a cause or characteristic to someone or something. 

  • To attribute a book, painting or any work of art or literature to a writer or creator. 

  • To believe in or agree with; subscribe. 

thank

verb
  • To feel gratitude or appreciation toward. 

  • To express gratitude or appreciation toward. 

  • To credit or hold responsible. 

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