The phrase "a time consuming activity" is correct and usable in written English.
You can use it whenever you need to describe a task that takes a long time to complete. For example: "Planning a wedding can be a time consuming activity."
Child care is an immensely time consuming activity and those who do it single-handedly are unlikely to be able to pursue other goods such as education, political office or demanding careers.
While the results are valuable, the data collection stage was an expensive and time consuming activity with many methodological issues and concerns compounded by the sensitive nature of the topic.
What John soon found out was that he could not sell as much as he wanted due to the time consuming activity of packaging the items.
Across all sub-samples the most common clinically-related activity reported was sitting in waiting rooms, and this was the most time consuming or second most time consuming activity after travel depending on the sub-sample.
More time consuming activities such as preparing special foods and carrying out treatments were carried out by fewer respondents.
Because exercise time tended to dominate all other reported times, it has been reported separately to allow the less time consuming activities to emerge.
The possibility of incorporating additional features into quality measurement (e.g. parent's noncompliance with therapy or clinicians' poor adherence to practice guidelines) raised the practical issue of how that could be measured without creating time consuming activities.
One stakeholder who had worked as a general practitioner in prisons, indicated that the need to constantly advocate for prisoners to receive particular treatments was a time-consuming activity and barrier to providing timely, client-centred care that was not encountered in usual practice in the community.
