Final answer:
The recording method of client observation that would be helpful when a CTRS needs to assess how much time a client is spending in a leisure activity is duration.
Step-by-step explanation:
The recording method of client observation that would be helpful when a CTRS needs to assess how much time a client is spending in a leisure activity is duration. Duration refers to the amount of time spent in a particular activity. It is a quantitative continuous data type, as it can be measured on a continuous scale, such as minutes or hours.
For context, 'Number of times per week' represents quantitative discrete data because it measures the occurrence of a distinct number of events. Such data is gathered for different purposes like assessing frequency rather than duration.