boat race vs forehead

boat race

noun
  • The face. 

  • A race between rowing crews. 

  • A fixed horse race, with a specific horse arranged to win in advance. 

forehead

noun
  • The part of the face above the eyebrows and below the hairline. 

  • confidence; audacity; impudence. 

  • The upper part of a mobile phone, above the screen. 

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