Table schema:
CREATE TABLE table_18143210_2 (top_division_titles VARCHAR, first_season_of_current_spell_in_top_division VARCHAR)

Question: How many top division titles were won during the 'first season of current spell in top division' in 1979-80?
SQL: SELECT top_division_titles FROM table_18143210_2 WHERE first_season_of_current_spell_in_top_division = "1979-80"