Venetian red vs reddish brown

Venetian red

adj

  • Of a brownish red colour. 

noun

  • A brownish red colour. 

  • A pigment producing this colour, derived from nearly pure ferric oxide (Fe₂O₃) of the hematite type. 

reddish brown

How often have the words Venetian red and reddish brown occurred in a corpus of books? (source: Google Ngram Viewer )