blabber vs godsib

blabber

noun
  • A person who blabs; a tattler; a telltale. 

verb
  • To blather; to talk foolishly or incoherently. 

  • To blab; to reveal a secret. 

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 blabber and godsib occurred in a corpus of books? (source: Google Ngram Viewer )