clock face vs forehead

clock face

noun
  • The surface of a clock that contains the dial and hands. 

forehead

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

  • confidence; audacity; impudence. 

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

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