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Continuum reverberation mapping with high-cadence, long-term UV/opticalmonitoring of Active Galactic Nuclei (AGNs) enables us to resolve the AGNcentral engine sizes on different timescales. The frequency-resolved time lagsof NGC 5548 (the target for the AGN STORM I campaign) are inconsistent with theX-ray reprocessing of the classical Shakura $\&$ Sunyaev disk model. Here weshow that the frequency-resolved time lags in NGC 5548 can be well produced bythe Corona-Heated Accretion-disk Reprocessing (CHAR) model. Moreover, we makethe CHAR model predictions of the frequency-resolved time lags for Mrk 817, thesource of the AGN STORM II campaign. We also obtain the frequency-resolved timelags as a function of the black-hole mass and Eddington ratio, which is validfor black-hole masses from $10^{6.5}$ to $10^9\ M_{\odot}$, and Eddingtonratios from 0.01 to 1. Moreover, we demonstrate that, with the time spans ofcurrent continuum reverberation-mapping campaigns, the lag-luminosity relationof the CHAR model can be $\tau_{\mathrm{gz}}\proptoL_{\mathrm{5100}}^{0.55\pm0.04}$, which is consistent with observations. Futureobservations can test our results and shed new light on resolving the AGNcentral engine.

Corona-heated Accretion-disk Reprocessing: Frequency-Resolved Lag Predictions for UV/Optical Reverberation Mapping of Active Galactic Nuclei