facial hair vs sideboards

facial hair

noun
  • Hair on the face of a human, such as the eyebrows of a man or woman or the androgenic hair (beard or moustache) of a man. 

  • Hair on the face of an animal. 

sideboards

noun
  • Sideburns. 

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