SQL & PL/SQL :: How To Do Selective Search Within A String

Assuming I have the following table with its data:

Quote:

| code | description |
| A | $abc + xyz = $cba - 2 |
| B | ($12345 + $12345)/3 |
| C | $poke + $abc = $abc + 456 - 789 |

How can I do a selective search on "description" column for any word that starts with the "$" sign? In the end, this is the resultset that I am expecting:

Quote:
| $ | count of $ |
| $abc | 3 |
| $cba | 1 |
| $12345 | 2 |
| $poke | 1 |