One can recite their Acarya thaniyan as many times possible, but one must recite at least once before proceeding to do japam.
Whenever we feel we have sinned and have committed offence we have to chant this slokam.
asmad desikam asmadIya paramAcaryan aSeshAn gurun
srimallakshmana yogi pungava mahApUrnau munim yAmunam |
rAmam padmavilocanam munivaram natham saTha-dveSinam
seneSam sriyam indirA sahacaram nArayaNam samSraye ||