allo vs same-sex

allo

adj
  • Allosexual and/or alloromantic; experiencing sexual and/or romantic attraction. 

noun
  • One who is allosexual and/or alloromantic. 

same-sex

adj
  • Of, relating to, or between homosexual men or women. 

  • Restricted to members of a single sex. 

How often have the words allo and same-sex occurred in a corpus of books? (source: Google Ngram Viewer )