Yep, it depends on how its gonna be used.

I was thinking about viewing this number on the screen, as is. If a user saw the number 20 for instance, they might more easily understand "about every three weeks" than if they saw the number .05

The developer would just need to determine which presentation makes more sense.

>Yes - that would work - but with my method, using the factor .033, if someone needed to know "about how many times will we see client "x" in the next 9 months, it would be s simple matter to multiply .033 * 270, and estimate a nine.
>
>>Possibly the other way around might be easier to understand?
>>number_of_days in period / number_of_appointments_in_period
>>
>>gives the number of days between appointments. (I find users have an easier time with integers than fractions).
>>
>>/ Jim
>>
>>>How about a daily weighted frequency:
>>>number_of_appointments_in_period / number_of_days in period
>>>So, if a patient comes in 3 times in 90 days.
>>>daily weight would be 3 / 90, or .033
>>>
>>>>Given a date parameter with 3 consecutive months(01Jan05 to 31March05), I need to find the appointment average frequency of a patient in this range. Patient can come in once a week or once a month or basically no pattern at all within that range. Assuming that I have 2 patient(A & B), here's my pattern:
>>>> A: 12Jan
>>>> 15Feb
>>>> 01Mar
>>>> 14Mar
>>>> B:04Jan 01Feb 01Mar
>>>> 11Jan 08Feb 03Mar
>>>> 18Jan 10Feb 08Mar
>>>> 19Jan 15Feb 15Mar
>>>> 21Jan 17Feb 17Mar
>>>> 25Jan 22Feb
>>>> 27Jan 24Feb
>>>>
>>>> Basic user parameter will consist of:
>>>> Date range - 01Jan05 to 31Mar05
>>>> Freqeuncy type - Weekly/Monthly
>>>>
>>>>So basically, Patient A has an average of 1/month and Patient B has 6/Month or 2/week. My problem here is what to use for the average frequency criteria (Week or Month). How should i handle the frequency type tp use (Month/Week)? Considering the scenario above, is it safe for me to say that if a patient that has less than 4 average frequency visit per month, I can make this to a weekly, if the user wanted the frequency per week.
>>>>Otherwise if its just less than 4 per month, my criteria will be a monthly frequency automatically, basically forcing it to be a Monthly type. Any ideas how or at least a better way of doing this? TIA!