godmother vs informer

godmother

noun
  • A woman present at the christening of a baby who promises to help raise the child in a Christian manner; a female godparent who sponsors the baptism of a child. 

verb
  • To act as godmother to. 

informer

noun
  • One who informs someone else about something. 

  • One who informs, animates, or inspires. 

  • A person who tells authorities about improper or illegal activity. 

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