Perhaps HMS Cambrian and HMS Volontaire?

‘Cotton committed the Blake to full-time coastal duties, telling Codrington that he was to command all the warships then serving off northern Catalonia, viz the frigates Cambrian and Volontaire (40) and the sloops Termagant and Sparrowhawk….’ Mentioned in Wellington’s Navy: Sea Power and the Peninsular War, 1807-1814.