Every night.

(computing) A build of a software program with the latest changes, released every night.

(literally) An owl (order Strigiformes) that is nocturnal. / (idiomatic) One who goes to bed late, or stays up late at night or in the early hours of the morning.

(now rare) A demon or monster, thought to plague people while they slept and cause a feeling of suffocation and terror during sleep.

To have a nightmare.

(obsolete) A loose robe worn as a nightgown.

Lasting throughout the whole night (or most of it)

Something that lasts throughout the whole night. / (UK, crime, slang) A session with a prostitute covering the entire night.

at night (during night-time, especially on a regular basis)

plural of night