Spring Data JPA - building a query before and after date

I am new to Java JPA - Spring Boot. I want to create a JPA lookup that will count the number of rows between two dates.

I need to get a number that shows the number of members that have joined in the last 28 days. So like 10.

But also get a value that indicates the difference from last month -- so +4% -- or -2% -- so I suppose it will be a count1/count2 * 100 = difference. How would you detect the polarity -- so assess if its negative or positive?

Currently I have something like this

long countByRegisteredDateAfter(Date thresholdDate) throws Exception;

but need something maybe more like this

long countByRegisteredBeforeDateAfter(Date thresholdDate1, Date thresholdDate2)
    throws Exception;

and maybe something more fine tuned like this

long countByRegisteredBeforeAndDateAfterAndRole(Date thresholdDate1, Date thresholdDate2, String role)
    throws Exception;

Code so far:

            // 28 days ago
            Calendar thresholdPast28 = Calendar.getInstance();
            thresholdPast28.set(Calendar.HOUR_OF_DAY,0);
            thresholdPast28.set(Calendar.MINUTE,0);
            thresholdPast28.set(Calendar.SECOND,0);
            thresholdPast28.add(Calendar.DATE,-28);

            java.util.Date thresholdPast28Date = thresholdPast28.getTime();
            Long countLast28Days = (Long) tblLoginRepository.countByRegisteredDateAfter(thresholdPast28Date);

            System.out.println("countLast28Days " + countLast28Days);


            // 56 days ago
            Calendar thresholdPast56 = Calendar.getInstance();
            thresholdPast56.set(Calendar.HOUR_OF_DAY,0);
            thresholdPast56.set(Calendar.MINUTE,0);
            thresholdPast56.set(Calendar.SECOND,0);
            thresholdPast56.add(Calendar.DATE,-28);

            java.util.Date thresholdPast56Date = thresholdPast56.getTime();
            Long countLast56Days = (Long) tblLoginRepository.countByRegisteredDateAfter(thresholdPast56Date);

            System.out.println("countLast56Days " + countLast56Days);