spins without bonus game.These statistics are from Play n Go provider and Swords and the Holy grail slot.
I made calculations for a one in 10,000 chance jackpot :
If I have one in 10 000 chances of winning the jackpot at each spin it means I have 9 999 chances of missing it.
Thus I have 9 999/10 000 x 9 999/10 000 of missing it for 2 spins
So for 1000 spins I'll get
(9 999/10 000)1000=90.5% chances of missing the jackpot
and 1 - 90.5%=9.5% chances of winning the jackpot at least one time
and for 10 000 spins
(9 999/10 000)10 000=37% of missing the jackpot
and 1 - 37%=63% chances of winning the jackpot at least one time