mog vs piffle

mog

verb
  • To move away; to go off. 

  • To assert one's dominance over. 

  • To pass better than someone. 

noun
  • Synonym of moggy: a domestic cat, especially a non-pedigree or unremarkable one. 

piffle

verb
  • To waste, to fritter away. 

  • To act or speak in a futile, ineffective, or nonsensical manner. 

noun
  • Nonsense, foolish talk. 

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