mouthing vs scowl

mouthing

noun
  • The act of forming a shape with the mouth, especially as part of sign language. 

  • Ranting; passionate speech devoid of meaning. 

scowl

noun
  • The wrinkling of the brows or face in frowning; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown. 

  • Gloom; dark or threatening aspect. 

verb
  • To express by a scowl. 

  • To wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry. 

  • To look at or repel with a scowl or a frown. 

  • To look gloomy, dark, or threatening; to lower. 

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