What was the total number of Laps for the rider whose time was +7.951?
CREATE TABLE "superbike_race_2_classification" (
  "rider" text,
  "bike" text,
  "laps" real,
  "time" text,
  "grid" real
);
SELECT COUNT("laps") FROM "superbike_race_2_classification" WHERE "time"='+7.951';