CREATE TABLE table_17122 ("Year" FLOAT, "B\\u00f6tzow" TEXT, "Schwante" TEXT, "Vehlefanz" TEXT, "Neu-Vehlefanz" FLOAT, "Marwitz" TEXT, "B\\u00e4renklau" TEXT, "Eichst\\u00e4dt" FLOAT)

How many years where Eichst dt had a number of 939?
SELECT COUNT("Year") FROM table_17122 WHERE "Eichst\u00e4dt" = '939'
SELECT COUNT("Year") FROM "table_17122" WHERE "Eichst\u00e4dt" = '939'