There is no answer to this question divet. Or if there was one it would be "it all depends" on:
- How good at interviews you are.
- What your personality is like.
- What your academice grades are
- How good a teamworker/communicator you are etc.....
If you are a bright guy, with a good personality and love working in teams, you could get the first job you apply to.
If your not suited to the career, they (an airline) will pick that up in the selection.
As mentioned above, the most important factor is luck. All I can suggest is to get your fATPL, then go on courses to hone you interview, teamworking, communication skills and then apply to every job on the market. Thats all you can do.
My mate did the Oxford integrated course about 3 yrs ago and no job. He has now paid for a type rating (737) - still no job.