This is a great trick to use when recording a musician that is inexperienced with a click track. Put a ping pong delay in the musician's monitors. It is not a crime to monitor an audio effect without recording it.
Choose your tempo; examine the part to determine the based note of the rhythm (e.g. 1/4 note based rhythm, 1/8 note based rhythm, etc.); then subdivide. So, If you are recording an 1/8th note based rhythm, and your tempo is 100BPM, then you want to set your delay at 150 milliseconds.
How did we get that number?
At 100BPM your 1/4 notes are occurring every 600 milliseconds, however your pattern is based on 1/8 notes (occurring every 300ms) and you always subdivide (in this case to 1/16 notes) so your delay needs to be set at 150ms. If you do not feel like doing the math many modern delays will do it for you, or you can use an online delay time calculator.