CREATE TABLE table_806 ("Rank by average" FLOAT, "Competition finish" FLOAT, "Couple" TEXT, "Total" FLOAT, "Number of dances" FLOAT, "Average" TEXT)

The minimum average number of dancers is 34.1 how many times
SELECT MIN("Number of dances") FROM table_806 WHERE "Average" = '34.1'
SELECT MIN("Number of dances") FROM "table_806" WHERE "Average" = '34.1'