tiptop vs topnotch

tiptop

adv
  • Excellently; in a first-rate manner. 

noun
  • The very topmost point. 

  • The highest or utmost degree; the best of anything. 

  • Oral stimulation of the male member, a blowjob (more commonly top). 

topnotch

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