grimace vs semblance

grimace

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

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

semblance

noun
  • the way something looks; appearance; form 

  • likeness, similarity; the quality of being similar. 

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