CREATE TABLE table_30836 ("By-election" FLOAT, "Electorate" CLOB, "Date" CLOB, "Incumbent" CLOB, "Reason" CLOB, "Winner" CLOB)

When james rutherford is the incumbent how many dates are there?
SELECT COUNT("Date") FROM table_30836 WHERE "Incumbent" = 'James Rutherford'
SELECT COUNT("Date") FROM "table_30836" WHERE "Incumbent" = 'James Rutherford'