mandarin orange vs orangeness

mandarin orange

noun
  • A small citrus tree (Citrus reticulata) with fruit resembling the orange. 

  • The fruit of this tree, smaller than an orange and oblate. In daily usage, it may include other similar citrus fruits like Citrus unshiu (satsuma or mikan) Citrus tangerina (tangerine). 

orangeness

noun
  • The quality of being orange in colour. 

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