where do I type that in
The magical computer box or just bash. (linux)
For windows, you could try this but I'm not sure if it would work.
Start by running the wallet as the daemon instead of QT. Then in command prompt start darkcoind. (You'll need to edit your configuration file by adding three lines)
darkcoin.conf
daemon=1
rpcuser=RandomNumbersAndLettersThatNoOneCanGuess
rpcpassword=SameThingAsAbove
Once you've started the daemon in command, stay in the same directory and try this:
C:\Users\solo20\Downloads\darkcoind.exe listtransactions "*" 100000 | findstr "txid"
I'm not sure if that is the equivalent grep command in windows but it's worth a shot!
Edit: That won't work. It's not counting the number of occurrences that txid occur.