doot vs figure on

doot

verb
  • think 

  • to scan 

  • to tap a card 

  • doubt 

noun
  • doubt 

  • beep (electronically-produced tone) 

figure on

verb
  • To plan or expect (something). 

  • To account for or rely on a particular fact or notion; to calculate (something) using a set of facts. 

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