omit vs underwhelm

omit

verb
  • To fail to perform. 

  • To delete or remove; to strike. 

  • To neglect or take no notice of. 

  • To leave out or exclude. 

underwhelm

verb
  • To fail to impress; to perform disappointingly. 

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