beccafico vs pettychaps

beccafico

noun
  • A small bird, Sylvia hortensis, the figpecker. 

pettychaps

noun
  • Any of several species of small European passerine songbirds, including the willow warbler (Phylloscopus trochilus), the chiffchaffs (Phylloscopus spp.), and the western Orphean warbler (Sylvia hortensis). 

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