man/man1/sleep.1

.th SLEEP I 11/1/73
.sh NAME
sleep \*- suspend execution for an interval
.sh SYNOPSIS
.bd sleep
time
.sh DESCRIPTION
.it Sleep
will suspend execution for
.it time
seconds.
It is used to execute a command
in a certain amount of time as in:
.s3
        (sleep 105; command)&
.s3
Or to execute a command every so often as in
this shell command file:
.s3
        : loop
.br
        command
.br
        sleep 37
.br
        goto loop
.sh "SEE ALSO"
sleep(II)
.sh BUGS
.it Time
must be less than 65536 seconds.