claver vs tell tales out of school

claver

verb

  • To gossip or chit-chat. 

noun

  • Frivolous or nonsensical talk; prattle; chatter. 

tell tales out of school

verb

  • To reveal confidential or sensitive information; to gossip. 

How often have the words claver and tell tales out of school occurred in a corpus of books? (source: Google Ngram Viewer )