boggle vs explain

boggle

verb
  • To be bewildered, dumbfounded, or confused. 

  • Either literally or figuratively to stop or hesitate as if suddenly seeing a bogle. 

  • To confuse or mystify; overwhelm. 

  • To embarrass with difficulties; to palter or equivocate; to bungle or botch. 

  • To wiggle the eyes as a result of bruxing. 

explain

verb
  • To make plain, manifest, or intelligible; to clear of obscurity; to illustrate the meaning of. 

  • To give a valid excuse for past behavior. 

  • To make something plain or intelligible. 

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