coleslaw vs leaf vegetable

coleslaw

noun
  • A salad of finely shredded raw cabbage and sometimes shredded carrots, dressed with mayonnaise (white slaw) or a vinaigrette (red slaw). 

leaf vegetable

noun
  • The leaf of a plant used as an edible vegetable, such as lettuce, spinach, or rocket. 

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