 There is a set of " verbal classifiers " used specifically for counting the number of times an action occurs , rather than counting a number of items ; this set includes <unk> cì , <unk> <unk> , <unk> <unk> , and 下 <unk> , which all roughly translate to " times " . For example , <unk> ( wǒ <unk> @-@ guo sān cì <unk> , I go @-@ PAST three @-@ CL Beijing , " I have been to Beijing three times " ) . These words can also form compound classifiers with certain nouns , as in <unk> rén cì " person @-@ time " , which can be used to count ( for example ) visitors to a museum in a year ( where visits by the same person on different occasions are counted separately ) . 
