debut vs first night

debut

noun
  • The first public presentation of a theatrical play, motion picture, opera, musical composition, dance, or other performing arts piece. 

  • The first appearance of a debutante in society. 

  • A performer's first performance to the public, in sport, the arts or some other area. 

  • The coming-of-age celebration of a woman's eighteenth birthday. 

verb
  • to formally introduce, as to the public 

  • to make one's initial formal appearance 

first night

noun
  • The first public performance of a play or other show, normally assumed to be held in the evening. 

  • The first night after marriage. 

  • Used other than figuratively or idiomatically: see first, night. 

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