Was diagnosing an intermittent internet failure, and for logging when it disappears - ping -D 8.8.8.8. -D prints the timestamps:

[1664029219.968932] 64 bytes from 8.8.8.8: icmp_seq=27 ttl=115 time=17.1 ms
[1664029220.971096] 64 bytes from 8.8.8.8: icmp_seq=28 ttl=115 time=18.0 ms
[1664029222.100859] 64 bytes from 8.8.8.8: icmp_seq=29 ttl=115 time=147 ms
[1664029222.973428] 64 bytes from 8.8.8.8: icmp_seq=30 ttl=115 time=19.4 ms
[1664029223.973696] 64 bytes from 8.8.8.8: icmp_seq=31 ttl=115 time=18.1 ms
[1664029224.990894] 64 bytes from 8.8.8.8: icmp_seq=32 ttl=115 time=33.9 ms
[1664029225.973556] 64 bytes from 8.8.8.8: icmp_seq=33 ttl=115 time=15.4 ms
[1664029226.978178] 64 bytes from 8.8.8.8: icmp_seq=34 ttl=115 time=18.5 ms
[1664029227.980347] 64 bytes from 8.8.8.8: icmp_seq=35 ttl=115 time=19.0 ms
[1664029228.989004] 64 bytes from 8.8.8.8: icmp_seq=36 ttl=115 time=26.4 ms
[1664029230.091472] 64 bytes from 8.8.8.8: icmp_seq=37 ttl=115 time=127 ms
[1664029230.982869] 64 bytes from 8.8.8.8: icmp_seq=38 ttl=115 time=18.3 ms