You would need some code to do this.

Some options:

1/open the top surnames gramplet and safe it as a new gramplet. Your idea of frequency of first names would be a great new gramplet. Also as a new report type this is interesting

2/If you want to avoid learning a bit of the internals of Gramps, then you can use spreadsheet. This goes as follows:
Via the Preferences->Display, set the name type to Given, so that only the first name shows in the person views. Then go the flat person view (so not grouped per surname), via the configuration make first name and birth date the first columns, sort on first name (click on column header) and export to a csv file using the menu option Family Tree->Export View, which you open in a spreadsheet (if you have LibreOffice you can directoy export the view as an opendocument spreadsheet, which is faster). Then use the spreadsheet functions to calculate and plot the frequencies. So, a function to add a column with the number of equal names in column 1 would be:
=COUNTIF(A1:A955, A1)
and then copy this formula from the first row down to the last by selecting and dragging it down.
This gives you a column with the frequency, then you remove duplicate rows and insert eg a pie chart with this frequency. I'm not a spreadsheet guru, for frequency per time period, writing it as a gramplet would be faster for me :-)

The second is fastest if you need a quick idea. The first is best to share with the Gramps community and make it really usefull with some options.

Greetings,
Benny

2011/11/15 Bobby Singh <b_bobby_singh@yahoo.com>
Hello There, 
I am trying to solve two problems and perhaps the list already knows a solution.
    a) If I want to get a frequency of first names in a database how can I do this?
    b) If I want to get the same statistics as in a) but generation by generation starting from the youngest to the oldest generation how would I do this?

Thanks and Regards,
-Bobby

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