| Keyword | Most frequent expressions (number of websites) |
|---|---|
| qsl | qsl card (23), paper qsl (6), qsl information (4), qsl kaart (3), personal qsl (2), qsl buro (2), old qsl (2), qsl pennant (1), recent qsl (1), existence qsl (1), lot qsl (1), direct qsl (1), qsl irc (1) |
| qso | picture qso (1), qso april (1), rx qso (1), qso hf (1), connection qso (1), eme qso (1), qso electron (1), pedition qso (1), qso ghz (1), friend qso (1), qso shack (1), procedure qso (1), qso cq (1) |