SEPfield - "Emirates is not like Delta or United 777 flying where you do 2-3 Londons or Rios or Shanghais in a month and your done."
Only senior guys fly three trips and then are done. Four to five is most common and sometimes 6 shorter trips to Europe (DUB/SNN/LHR/MAN, etc).
Avg is probably 82-85 hrs for line holders.
For U.S. based flying S. America trips aren't for the faint of heart - 2200-0000 departure, land 8-10 hrs later. Return the following night departing around 2200-0000, landing 0400-0600.