cat's claw vs weeping willow

cat's claw

noun
  • Carpobrotus edulis, or uña de gato (Spanish: "cat's claw"), a plant species in the Aizoaceae family 

  • Uncaria tomentosa, a plant species found in the tropical jungles of South and Central America 

  • Biancaea decapetala, a thorny evergreen shrub of India 

  • Acacia plumosa, a medicinal plant species native to Brazil 

  • Used other than figuratively or idiomatically: see cat, claw. 

  • Grevillea alpina, a shrub species native to Australia 

  • Mimosa nuttallii (formerly Schrankia nuttalli), a plant native to the Midwestern United States 

  • Dolichandra unguis-cati, or cat's claw creeper, a Central American climbing vine of the Bignoniaceae family 

  • Uncaria rhynchophylla, a plant species used in traditional Chinese medicine 

  • bayag-kambing (Caesalpinia crista) 

  • Martynia annua, a plant species endemic to Brazil 

  • Senegalia greggii, formerly Acacia greggii, a tree species native to the southwestern United States and northern Mexico 

  • Uncaria guianensis, a plant species found in Guyana 

weeping willow

noun
  • A willow of species Salix babylonica, with pendulous branches, native to China. 

  • Any of the numerous decorative cultivars and hybrids of Salix babylonica with white willow (Salix alba) or crack willow (Salix fragilis). 

How often have the words cat's claw and weeping willow occurred in a corpus of books? (source: Google Ngram Viewer )