A long time gaze means to look at something very intently for an extended period of time. You could use the word stare to mean the same thing.
I think it means "Long Time No See"
For a long time.
time long past
Long Time No See
It is a long silence or, silent for a long time.
It is asking for the length. It could be a linear dimension (usually the largest) or it could be the duration of time.
If you mean how long do you take a pulse for? A Mintute.
A long period of time can mean a great many things. It could mean that something isn't ready or prepared.
What do you mean the time? If you mean the flipping time for one page, then you can set the time by yourself. Normally 0.6 second is recommended. But if you mean how long we read a page of a flip book, that depends on different people.
no sitting there and not moving for a long time
Chronic
no sitting there and not moving for a long time