Check to Determine if One of Two Processes are Running


I would like a check to determine if one of two processes are running. I have an application that runs one of two programs depending on the mode it is in. I want the check to return a critical state only if neither of the two programs are running. I am using the “check_process” command to check if one (or more) programs are running which works fine but I cannot figure out how to perform an “OR” check for this one custom application.