cherry laurel vs mock-orange

cherry laurel

noun
  • Prunus caroliniana, native to the southeastern United States. 

  • Prunus laurocerasus, an evergreen shrub, native to regions bordering the Black Sea in southwestern Asia. 

mock-orange

noun
  • Maclura pomifera (Osage orange), of North America 

  • Pittosporum tobira, native to China, Japan, and Korea, and naturalized and cultivated elsewhere 

  • Bursaria spinosa (Australian blackthorn) 

  • especially, Philadelphus coronarius (sweet mock orange), widely cultivated 

  • Styrax americanus (American snowbell) 

  • Murraya paniculata (orange jessamine), a small tree ranging from East Asia to Australasia 

  • Philadelphus lewisii (Lewis' mock-orange), of western North America 

  • Pittosporum undulatum (sweet pittosporum), of Australia 

How often have the words cherry laurel and mock-orange occurred in a corpus of books? (source: Google Ngram Viewer )