bashment vs chorea

bashment

noun
  • Dancehall music. 

  • A party or rave. 

chorea

noun
  • An Ancient Greek circular dance accompanied by a chorus. 

  • Any of the various diseases of the nervous system characterized by involuntary muscular movements of the face and extremities; St. Vitus's dance. 

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