A clinic may quote a number of shockwave sessions as though it were settled, so this question is worth asking carefully before any plan is agreed.
Start with what one session contains
The trial described below reports what happens inside each session. It is the better thing to ask a clinic about when a session count is quoted: how was that number set, and what does each session deliver?
What the trial reports
NIH PMC hosts the report of an open label randomized clinical trial in which, as it states, each session used 3 or 4 myofascial points, and "1500 shocks of focused shockwaves (5 Hz, 0.05-0.167 mJ/mm 2 , according to the patient’s pain threshold) per point were administered".
The trial is a study of myofascial points treated with focused shock waves for plantar fasciitis. The dose is tied to the patient's pain threshold, so even within one study a session is not a fixed unit.
Related reading
For a wider view, there is a meta-analysis of randomized trials on shock wave therapy for chronic plantar fasciitis. A further paper looks at long-term effectiveness of ESWT in amateur runners with plantar fasciitis.
What to ask before you commit
Ask the clinic for the planned number of sessions and the reason for it. Ask how many points are treated per session and how the intensity is chosen. For anyone in Mount Prospect weighing a package price, ask what happens to the plan if the first sessions do not change anything.
How the claim reads against the evidence
A session count presented as standard is a label. The evidence here describes a session as points, shocks and a pain threshold, so a count only means something when those details come with it.