almond tree vs umbrella tree

almond tree

noun

  • The Indian almond, Terminalia catappa. 

  • The tree that bears the almond, Prunus amygdalus. 

umbrella tree

noun

  • Terminalia catappa, the Indian almond. 

  • Magnolia tripetala, the umbrella magnolia. 

  • Musanga cecropioides, the African corkwood. 

  • Vachellia tortilis, the umbrella thorn. 

  • Polyscias murrayi, an Australian rainforest tree. 

  • Schefflera actinophylla, the octopus tree. 

How often have the words almond tree and umbrella tree occurred in a corpus of books? (source: Google Ngram Viewer )