cold as a well-digger's arse vs snow-white

cold as a well-digger's arse

adj

  • Very cold. 

snow-white

adj

  • As white as snow; exceptionally white. 

noun

  • A Caucasian person, especially a woman. 

How often have the words cold as a well-digger's arse and snow-white occurred in a corpus of books? (source: Google Ngram Viewer )