CREATE TABLE table_204_349 (id NUMBER, "year" NUMBER, "conservative\ councillors" NUMBER, "labour\ councillors" NUMBER, "independent\ councillors" NUMBER, "liberal\ councillors" NUMBER)

in how many years were there no liberal councillors ?
SELECT COUNT("year") FROM table_204_349 WHERE "liberal\ncouncillors" = 0
SELECT COUNT("year") FROM "table_204_349" WHERE "liberal\ncouncillors" = 0