CREATE TABLE table_39465 ("Name" TEXT, "Status" TEXT, "Population" FLOAT, "District" TEXT, "Former local authority" TEXT)

What is the population of the Parish, Plumbland, that had a former local authority of Cockermouth Rural District?
SELECT COUNT("Population") FROM table_39465 WHERE "Former local authority" = 'cockermouth rural district' AND "Name" = 'plumbland'
SELECT COUNT("Population") FROM "table_39465" WHERE "Former local authority" = 'cockermouth rural district' AND "Name" = 'plumbland'