naturalist vs phytologist

naturalist

noun
  • An expert in natural history or the study of plants and animals. 

  • A person who believes in or advocates the tenets of philosophical or methodological naturalism. 

  • A creative artist who attempts to faithfully represent nature; an adherent of artistic naturalism. 

phytologist

noun
  • One skilled in phytology; a writer on plants; a botanist. 

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