fir vs juniper

fir

noun
  • Wood of such trees. 

  • Any pinaceous conifer of related genera, especially a Douglas fir (Pseudotsuga) or a Scots pine (Pinus sylvestris). 

  • A conifer of the genus Abies. 

juniper

noun
  • One of a number of coniferous trees which resemble junipers. 

  • Any shrub or tree of the genus Juniperus of the cypress family, which is characterized by pointed, needle-like leaves and aromatic berry-like cones. 

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