overestimate vs scuff

overestimate

noun
  • An estimate that is too high. 

verb
  • To judge or calculate too highly. 

scuff

noun
  • A scurf; a scale. 

  • A mark left by scuffing or scraping. 

  • The back part of the neck; the scruff. 

verb
  • To hit lightly, to brush against. 

  • To mishit (a shot on a ball) due to poor contact with the ball. 

  • To scrape and roughen the surface of (shoes, etc.) 

  • To scrape the feet while walking. 

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