occur

To happen or take place.

The liftoff will occur in exactly twelve seconds.

And no use for anyone to tell Charles that this was because the Family was in mourning for Mr Granville Darracott […]: Charles might only have been second footman at Darracott Place for a couple of months when that disaster occurred, but no one could gammon him into thinking that my lord cared a spangle for his heir.

To present or offer itself.

I will write if the opportunity occurs.

To come or be presented to the mind; to suggest itself.

One little incident of my school days occurs to me as amusing.

It occurred to him to tell me of the problem.

To be present or found.

The chemical monofluoroacetate occurs in all parts of Dichapetalum cymosum, and is responsible for its toxic effects.