CREATE TABLE table_204_414 (id DECIMAL, "name" TEXT, "armenian" TEXT, "location" TEXT, "# of prisoners designed for" DECIMAL, "notes" TEXT)

name the location used the most number of times in the table .
SELECT "location" FROM table_204_414 GROUP BY "location" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "location" FROM "table_204_414" GROUP BY "location" ORDER BY COUNT(*) DESC NULLS LAST LIMIT 1