LSD-25 vs lysergic acid diethylamide

LSD-25

noun

  • LSD (lysergic acid diethylamide). 

lysergic acid diethylamide

noun

  • A powerful synthetic hallucinogen, commonly abbreviated LSD. 

How often have the words LSD-25 and lysergic acid diethylamide occurred in a corpus of books? (source: Google Ngram Viewer )