"contains" as in the the text 1- might appear anywhere in the Character field? Is Character Field defined as a text or number field?
If it's a text field and you truly mean "contains":
Use the formula option to create this expression:
PatternCount ( YourTable::Character ; "1-" )
and specify the format you want to see when 1- appears somewhere within the YourTable::Character text field.
Note that you would use your table occurrence name in place of "YourTable".