fright vs frighten

fright

noun
  • A state of terror excited by the sudden appearance of danger; sudden and violent fear, usually of short duration; a sudden alarm. 

  • Someone strange, ugly or shocking, producing a feeling of alarm or aversion. 

adj
  • frightened; afraid; affright 

frighten

verb
  • To cause to feel fear; to scare; to cause to feel alarm or fright. 

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