chatterbox vs godsib

chatterbox

noun
  • A cootie catcher (children's fortune-telling device). 

  • One who chats or talks to excess. 

  • Synonym of chatterbot 

godsib

noun
  • One's sibling or kin via a godfamily tie: one's or one's child's godparent, or one's godchild's parent, or one's godparent's child. 

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