Maclura pomifera vs mock orange

Maclura pomifera

mock orange

noun
  • Bursaria spinosa (Australian blackthorn), a small tree from Australia. 

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

  • Choisya ternata (Mexican orange), an aromatic shrub native to North America. 

  • Maclura pomifera (Osage orange), a small tree from North America. 

  • Any shrub of the genus Philadelphus, particularly Philadelphus coronarius (sweet mock orange). 

  • Pittosporum undulatum (sweet pittosporum), a small tree native to Australia. 

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