acorn vs rutabaga

acorn

noun
  • The fruit of the oak, being an oval nut growing in a woody cup or cupule. 

  • A cone-shaped piece of wood on the point of the spindle above the vane, on the mast-head. 

  • See acorn-shell. 

  • A testicle. 

rutabaga

noun
  • The edible root of this plant 

  • The swede, or Swedish turnip; the European plant Brassica napus var. napobrassica 

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