CREATE TABLE table_50090 ("Name" TEXT, "Branch" TEXT, "Term began" TEXT, "Term ended" TEXT, "Time in office" TEXT)

What time in office does the U.S. Navy have?
SELECT "Time in office" FROM table_50090 WHERE "Branch" = 'u.s. navy'
SELECT "Time in office" FROM "table_50090" WHERE "Branch" = 'u.s. navy'