Here are a few ways
WordFrequencyData[{"cat", "dog", "mouse"}] // Dataset
WordFrequencyData[{"cat", "dog", "mouse"}] //
KeyValueMap[<|"Word" -> #, "Frequency" -> #2|> &] //
Dataset
WordFrequencyData[{"cat", "dog", "mouse"}] //
KeyValueMap[{#, #2} &] //
Prepend[Style[#, Bold] & /@ {"Word", "Frequency"}] //
Grid[#, Frame -> All, Background -> {None, {Yellow}}] &