Enter the amount of time you want the command block to delay for and if it uses ticks or seconds, then power it:
Putting a "t" right after the amount tells the command block to wait in ticks, and putting an "s" tells the command block to wait in seconds.
After it's powered and it waits the allotted time, the command block will give out a comparator signal for 1 second before turning off again: ( This ensures the command block can be used in a repeating redstone circuit without locking up.)
Why it's helpful:
Say you want an 11 second delay for a redstone device you're working on. You could do this:
Or you could do this: (/wait 11s)
Along with that, if you use ticks instead of seconds, you can make extremely precise timing. (Down to 1/20th of a second.)
Need I say more?
Please vote up top, and post down below! (Constructive criticism is always welcome.)
Or maybe just /wait 10 for to ticks, and /wait 10s for 10 seconds (200 ticks). This is basically how /xp works (the above user mentioned it). "/xp 5 [PlayerNameHere] " adds 5 xp points, and "/xp 5L [PlayerNameHere]" adds 5 levels. This is even simpler. The above user may have been suggesting this. If so, sorry, I wasn't exactly sure what they meant regarding this.
This sounds like an excellent idea, and for easiness, I think that it should be ticks if you leave the t/s bit blank, and also make it work if you type ticks or seconds as well. That would help for the /help command.