The act of something happening; occurrence.
The falling of a point on a line, or a line on a plane.
The striking of radiation or a projectile upon a surface.
The manner of falling; bearing or onus, as of a tax that falls unequally.
The extent or the relative frequency of something happening.
A measure of the rate of new occurrence of a given medical condition in a population within a specified period of time.
The time when something happens.
The synchronization of the firing of the spark plugs in an internal combustion engine.
The regulation of the pace of e.g. an athletic race, the speed of an engine, the delivery of a joke, or the occurrence of a series of events.
An instance of recording the time of something.