=ARRAYFORMULA(BYROW($L$5:$L$132;LAMBDA(row;IF(row="";"";LET(count;COUNTIF(SPLIT(row;",");"1");res;ROUNDDOWN(count/3);IF(res>0;res;""))))))
=ARRAYFORMULA(BYROW($L$5:$L$132;LAMBDA(row;IF(row="";"";LET(count;COUNTIF(SPLIT(row;",");"1");res;ROUNDDOWN(count/3);IF(res>0;res;""))))))