putty knife vs spackle

putty knife

noun
  • A similar tool with a wide, flat blade used by painters, plasterers, and carpenters to spread putty to fill holes and cracks. 

  • A hand tool with a flexible blade used by glaziers to apply putty to seal window panes to the frame and mullions. 

spackle

noun
  • A plastic paste meant for filling cracks and holes in plaster. 

  • Any powder (originally containing gypsum plaster and glue) that when mixed with water forms a plastic paste, which is used to fill cracks and holes in plaster. 

  • A paste-like substance that fills a gap. 

verb
  • To fill gaps with something, as if spackling; to speckle 

  • To fill or repair with a plastic paste. 

  • To fill cracks or holes with a spackle. 

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