coping saw vs fretsaw

coping saw

noun
  • A thin-bladed saw for cutting wood into curved shapes. 

fretsaw

noun
  • A saw consisting of a metal frame having a fine-toothed narrow blade held under tension, used in making curved cuts. 

verb
  • To cut with a fretsaw. 

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