"Number of Job Application changed to..." Code Needed

Does anyone know the code behind the following columns? For example, when viewing the numbers, the highlighted "Number of Job Application changed to Job Offer Phase" field appears to show the total count of job applications that have ever been in the job offer phase for that job requisition. The total, from what I can tell, includes those that have since moved to other phases/states as long as they were once in the job offer phase. If anyone has it, please share the code behind any of these columns. I am currently trying to create a similar column that would