dissemble vs undersee

dissemble

verb
  • To deliberately ignore something; to pretend not to notice. 

  • To falsely hide one's opinions or feelings. 

  • To disguise or conceal something. 

  • To feign. 

undersee

verb
  • To neglect; fail to see properly or adequately; turn a blind eye to; ignore. 

  • To see or look under or below; see below the surface of. 

  • To look intently into; examine; inspect. 

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