How often do you clean your Wool pants

Depends how much I piss on them.

As infrequently as possible. If they smell or have visible stains, they get dry cleaned. Otherwise, it's a good brush, airing-out, and when necessary, steam press.
I'm also a strong advocate of the two pants for each jacket policy, because my jackets never wear as quickly as my pants (the jacket comes off the second I reach the office, the pants, unfortunately, have to stay on for the day..)

EI

You're supposed to clean them....?

Wear as infrequent as possible (having >50 pairs help)
Avoid dry cleaning like the plaque unless there is obvious stain
Brush and steam press does the trick for me.

I dry clean mine as infrequently as possible during the season, and once at the end of the season before storage for summer.

No one has been able to give a quant answer yet.

3 wears? 10 wears? 30 wears?

How about

ONLY WHEN VISIBLY DIRTY LIKE WITH A STAIN

What kind of brush?

Step 1: Treat them like raw denim.

Step 2: Go start a thread in SW&D about how often to wash raw denim.

(Step 3: ???????)

Step 3: Find happiness in your appropriately washed pants.

Where does the profit come in? Still though, the SW&D boys will not appreciate this.

Cloth brush.

Try Google "Kent brush"

I have them cleaned if they smell funny which isn't very often

Thanks

How do we remove the wrinkles that appear after 4 or 5 wears? What about if you get caught in a downpour?

Simply get the pants (and suit) pressed as opposed to cleaned?