I used to live just outside of Corona, but moved away from that area six months ago. As of that time, the following was accurate:
154.235/ 159.165 PL103.5 CFD dispatch.
158.745 CFD tac 1 PL103.5
158.805 CFD tac 2 (last heard 2020).
154.785 CFD PL103.5 tac 3 (last heard 2021).
156.15 CFD tac 4 (last heard 2017).
Your 154.755/ 156.045 PL94.8 used to be Corona PD dispatch. They went to the Riv Co TRS in 2018. It's possible that the city gave these frequencies to the FD, but I hadn't heard anything on those frequencies since 2018.
Your 155.76/ 151.4 PL151.4 has to be a typo. 155.76/ 159.105 PL151.4 used to be CPD tac 1, but again, not used since 2018. Also, the input can't be 151.4 because that's a CalFire air attack frequency that's used all over soCal.
Regards, Mike