grimace vs love bite

grimace

noun
  • A contorted facial expression, often expressing contempt or pain. 

verb
  • To make grimaces; to distort one's face; to make faces. 

love bite

noun
  • A swelling on the skin caused by someone (or something) sucking the skin. 

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