frutex vs sapling

frutex

noun
  • A plant with a woody, durable stem, but less than a tree; a shrub. 

sapling

noun
  • A young tree, bigger than a seedling. 

  • A youngster, especially a male nearing maturity. 

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