hourly auth logs -> change to daily

Hopefully easy question - I recently rebuilt to v3.0.18 and the authentication logs in /usr/local/var/log/radius.log are being created hourly.  I want to change this to daily - where is the config for this?   I have my radacct detail files going daily via mods-enabled/detail but can't figure out config for the file = ${logdir}/radius.log Thank you in advance, Colleen