CREATE TABLE table_17601 ("Rank" FLOAT, "Fastest time  ( s ) " CLOB, "Wind  ( m/s ) " CLOB, "Athlete" CLOB, "Nation" CLOB, "Date" CLOB, "Location" CLOB)

Nigeria had the fastest time once.
SELECT COUNT("Fastest time (s)") FROM table_17601 WHERE "Nation" = 'Nigeria'
SELECT COUNT("Fastest time (s)") FROM "table_17601" WHERE "Nation" = 'Nigeria'