Kaptein Max,
8-10 days rostered off per month is the standard minimum around the world. Add to that 2,5 days per month accumulated towards vacation, which you are supposed to take out at the end of a 6 or 12 months contract. In many cases these 2,5 days will be given as off days every month. Last, but not least; when you have finished a contract you can take off as long as you like. The time is yours. And since the salary for a contract pilot is slightly higher (risk factor build in for not being able to pick up a new contract straight away) than for a permanently employed, most colleauges set aside a little bit (I hope) for the time in-between contracts.