68As regards the search of the Cedelex database, the mere fact that a number of trade marks relating to Class 35 contain the word ‘bus’ is not enough to establish that the distinctive character of that element has been weakened because of its frequent use in the field concerned. Firstly, the search in question does not provide any information on the trade marks actually used in relation to the services concerned. Secondly, it includes a number of trade marks in which the word ‘bus’ is used descriptively by public transport businesses.