Use the cron bang, e.g. !cron 15 * * * *
Because the spaces are escaped (replaced with +), the result will be wrong.
The result url: https://crontab.guru/#15+*+*+*+*
The result should be
https://crontab.guru/#15 * * * *
(ddg bang result)
or
https://crontab.guru/#15_*_*_*_*
(crontab guru result)