* doc/lispref/os.texi (Timers): Mention run-with-timer (bug#37875).
The function @code{run-at-time} returns a timer value that identifies
the particular scheduled future action. You can use this value to call
@code{cancel-timer} (see below).
+@end deffn
+
+@deffn Command run-with-timer secs repeat function &rest args
+This is exactly the same as @code{run-at-time} (so see that definition
+for an explanation of the parameters; @var{secs} is passed as
+@var{time} to that function), but is meant to be used when the delay
+is specified in seconds.
@end deffn
A repeating timer nominally ought to run every @var{repeat} seconds,