config_schedule - euzu/tuliprox GitHub Wiki

schedule

#   sec  min   hour   day of month   month   day of week   year
schedule: "0  0  8,20  *  *  *  *"

This example starts the update every day at 8 AM and 8 PM

Schedule is optional.

At the given times the complete processing is started. Do not start it every second or minute.
You could be banned from your provider. Twice a day should be enough.