Cron Expression for every X weeks on DayOfWeekX and DayOfWeekY at HH:MM

I thought I would be able to achieve this with the following Cron Expression: “45 9 */14 * 2,3”
I thought this would produce an occurrence every 2 weeks on Tuesday and Wednesday and 9:45 but there was no occurrences. Is there a way to achieve this without manually checking if it is the right day of the week when the job is fired?