renewable vs workable

renewable

adj

  • Able to be renewed; capable of renewal. 

  • Sustainable; able to be regrown or renewed; having an ongoing or continuous source of supply; not finite. 

noun

  • A renewable resource. 

  • A thing that is renewable; especially, a renewable source of energy. 

workable

adj

  • Capable of functioning. 

  • Able to be worked or fashioned 

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