There are often incidents that require you to spend more that a 2 unit time frame with client's, such as when you intially assume the case.  The client requires an increases amount of attention when being connected to different resources in order to assist them with becoming more independent.  

Also, seeing an individual this many times a week decreases their ability to gain independence as oppose to increasing their independence.  

I feel that times should be allotted basesd off of a particular situation.