This is not possible in a single cron if you want to include 19:00 but not 19:15, 19:30 and 19:45
To exclude 19:00 (and run that as a separate job), use this
*/15 7-18 * * *
This is not possible in a single cron if you want to include 19:00 but not 19:15, 19:30 and 19:45
To exclude 19:00 (and run that as a separate job), use this
*/15 7-18 * * *