scutter vs skirr

scutter

verb
  • To run with a light pattering noise; to skitter. 

  • To void thin excrement. 

noun
  • Thin excrement. 

  • A hasty run. 

skirr

verb
  • To make a whirring sound. 

  • to pass over quickly, skim 

  • To leave hastily; to flee, especially with a whirring sound 

  • To search about in, scour 

noun
  • A tern. 

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