mudlark vs scruff

mudlark

verb
  • To scavenge in river or harbor mud for items of value. 

noun
  • A soldier of the Royal Engineers. 

  • Any of various birds that are found in muddy places or build their nests with mud, especially Anthus petrosus and Alauda arvensis. 

  • The Grallina cyanoleuca that builds its nest with mud into a bowl-like shape. 

  • A child who plays in the mud; a child that spends most of its time in the streets, a street urchin. 

  • A racehorse that performs well on muddy or wet tracks. 

scruff

verb
  • To lift or carry by the scruff. 

noun
  • The back of the neck, nape; also scruff of the neck. 

  • Someone with an untidy appearance. 

  • The loose skin at the back of the neck of some animals. 

  • Stubble, facial hair (on males). 

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