How many encounters does your average dungeon-crawl have?

[Splode]

I don't know if this is something that's ever been established, but is there a certain number of encounters (combats, traps, haunts, etc.) that an average-sized dungeon usually has? I imagine that it varies depending on the CR of the individual encounters, and the CR of the dungeon itself. I was just curious if, from experience, anyone came up with an "average" of # of encounters in a given dungeon.

If you're a GM, is there a number that you strive for in planning out dungeons?

[voideternal]

No.

Some dungeons are big. Some dungeons are small. Some dungeons can be reasonably cleared in one day. Some dungeons can't be cleared in one day and the encounters will enter / leave the dungeon as time passes. Some dungeons have alarms that summon all the other encounters at once. Some dungeons have hundreds of rooms with nothing inside but empty crates.

To the above, I don't really know what you mean by "CR of Dungeon". CR is for individual challenges.