single-use vs unwashable

single-use

adj

  • Designed to be used one time and then discarded or disposed of. 

unwashable

adj

  • Not washable; that cannot be washed. 

noun

  • Something that cannot be washed in the normal way without being damaged. 

How often have the words single-use and unwashable occurred in a corpus of books? (source: Google Ngram Viewer )