1 Relative frequency: the result of dividing the absolute frequency of a certain value by the total number of data.  The sum of the relative frequencies is equal to $$1$$. We can prove this easily by factorizing $$N$$. Cumulative frequency: the sum of absolute frequencies of all the values equal to or less than the considered value.
Having said that you should have to wait 8 years from the last FILING DATE of your previous bankruptcy. The old time period prior to 2005 was 7 years before you could file again, but that was expanded to 8 years after the Bankruptcy Abuse and Consumer Protection Act of 2005 was passed.
Technically, bankruptcy law does not set any minimum time that you to wait before you can file for bankruptcy again. However, there is a catch. If you file too soon after you have received a discharge of your debts in a prior case, you cannot receive another discharge.