leaf vegetable vs salad

leaf vegetable

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

salad

noun
  • A raw vegetable of the kind used in salads. 

  • Especially, such a mixture whose principal base is greens, most especially lettuce. 

  • Any varied blend or mixture. 

  • A food made primarily of a mixture of raw or cold ingredients, typically vegetables, usually served with a dressing such as vinegar or mayonnaise. 

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