From https://en.wikipedia.org/wiki/List_of_earthquakes_2021%E2%80... there were 44 earthquakes with a magnitude >= 7.0 in the last 2.5 years. That is one every 17 days. The GP is almost correct: There is a high chance [1] of an earthquake somewhere in the world, including oceans, in 17 days.
[1] If you want to be fancy with probabilities, 64% of at least one earthquake. In some 17 days periods you will get no earthquake and in others you will get more than one earthquake. In average you will get one.
Too late to edit: The correct number is 21 instead of 17.
The 64% is still 64% because if N is big enough it almost doesn't depend if you consider something with a probability of 1/17 in 17 days or something with a probability of 1/21 in 21 days.
[1] If you want to be fancy with probabilities, 64% of at least one earthquake. In some 17 days periods you will get no earthquake and in others you will get more than one earthquake. In average you will get one.