guff vs plain English

guff

verb
  • To mislead. 

  • To fart. 

noun
  • A fart; act of breaking wind. 

  • Nonsensical talk or thinking. 

  • Superfluous information. 

  • Insolent or otherwise unacceptable remarks. 

plain English

noun
  • English that does not use any jargon or technical / scientific terminology. 

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