Often, the most time-consuming part of soup-making is waiting for some water to come to the boil.

Removing the old mortar is probably the hardest and most time-consuming part of the job.

This step is the most time-consuming part of the algorithm.

This can be the most arduous and time-consuming part of painting.

The tunnels were the most difficult and time-consuming part of construction.

Manufacturing the masks is the most time-consuming part of the process.

This was the most time-consuming part of the whole exercise.

Those are all very time-consuming parts of the day.

The most time-consuming part of it was fighting off all the types who found me attractive.

"Even if there are more boats having to pass through, the most time-consuming part is the opening and closing of the bridge."