  We present a noteworthy transient event in the optical light curves of
ztf18aanlzzf (SDSS J161259.83+421940.3), identified as a Narrow Line Seyfert 1
(NLS1) exhibiting merging patterns in the optical image. The 16-year long-term
archived light curve revealed that this target stays in a steady state, while
three flares occurred within the past 5 years with time separations ranging
from 1 year to 3.5 years. The flare patterns of rapid brightening and slow
decline following the peak, coupled with distinctive spectral features with
strong He {\sc ii} and rare appearance of Bowen fluorescence line emissions,
indicate at least two Tidal Eruption Event (TDE) flares in ztf18aanlzzf with a
time separation of 3.5 years. We also apply TiDE light curve modeling and yield
a Black Hole (BH) mass of $\sim 10^{6}\ M_{\odot}$, which is consistent with
the BH mass measured from single-epoch spectra. Besides, the observed time lags
$3.90_{-2.00}^{+2.06}$ days between the g and r bands strongly disagree with
the prediction of the standard accretion disk model, highlighting the intricate
interaction in the inner region related to the TDE. The reoccurrence gap of
these TDEs, surpassing the previously reported repeated TDEs, can be attributed
to binary star tidal disruption by a binary SMBH. Notably, the frequent TDE
flares observed in this ULIRG-like target align with findings in a previous
report for another ULIRG, suggesting a potentially elevated TDE rate in ULIRGs.
Systematic variability studies of ULIRGs may help verify whether ULIRGs indeed
have higher TDE rates.
