the one-third time and one-third and time

问题描述:

the one-third time and one-third and time
he did it ____it took me .为什么the one-third time不得呢?
who can tell me

the one-therd time 是第三次的意思;
one-third time 是三分之一的时间的意思;
he did it one-third time it took me.
意思是:他做这个用了我做这个的三分之一的时间.