weatherproof vs wetproof

weatherproof

verb

  • To make something resistant to damage caused by the weather. 

adj

  • Capable of resisting damage caused by the weather. 

wetproof

verb

  • To make waterproof. 

adj

  • Waterproof. 

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