You can create very simple word frequency list.  Just click Count Words.  You can search a word on a list with Concord.  Select a word and right click -> Search in Concord.  Make sure you select a word before you do this.




You can select a word it in Concord.  Right-click the selected word.  You can also select multiple words.


If you enable Multiple word search in Preferences, you can search main/sub corpora for selected words.  Select word(s) from both corpora and right-click one of the selection.  The corpus (table) you click to run Concord will be the main corpus.