One hack is to (mis)use the ping command:
ping 127.0.0.1 -n 6 > nul
Explanation:
- ping is a system utility that sends ping requests.
ping is available on all versions of Windows.
127.0.0.1 is the IP address of localhost. This IP address is guaranteed to always resolve, be reachable, and immediately respond to pings.
-n 6 specifies that there are to be 6 pings. There is a 1s delay between each ping, so for a 5s delay you need to send 6 pings.
> nul suppress the output of ping, by redirecting it to nul.