dustpan vs putty knife

dustpan

noun
  • A flat scoop with a short handle, into which dust, dirt and other material is conveyed with a brush or broom. 

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. 

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