exclude vs fail to mention

exclude

verb
  • To expel; to put out. 

  • To omit from consideration. 

  • To bar (someone or something) from entering; to keep out. 

  • To refuse to accept (evidence) as valid. 

  • To eliminate from diagnostic consideration. 

fail to mention

How often have the words exclude and fail to mention occurred in a corpus of books? (source: Google Ngram Viewer )