approximate vs doot

approximate

verb
  • To estimate. 

  • To come near to; to approach. 

  • To carry or advance near; to cause to approach. 

adj
  • Nearing correctness; nearly exact; not perfectly accurate. 

  • Approaching; proximate; nearly resembling. 

doot

verb
  • think 

  • to scan 

  • to tap a card 

  • doubt 

noun
  • doubt 

  • beep (electronically-produced tone) 

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