Passage: In spite of their difficulties the party made good progress until, on 17 February about 10 miles (16 km) short of the Bluff depot, they were halted by a blizzard. They remained tent-bound for five days, by which time their supplies had run out. In desperation the party left the tent the next day, but it soon proved impossible for Mackintosh and Spencer-Smith to travel further.  Joyce, Richards and Hayward then sledged through the blizzard to the Bluff, leaving the invalids in a tent under the care of Wild. This round trip of about 20 miles (32 km) took them a week to complete.   They returned with food and fuel to sustain their comrades, and the march resumed. Within a short time Mackintosh joined Spencer-Smith on the sledge, and before long, Hayward too collapsed. The three men still on their feet were by now too weak to haul three invalids, so on 8 March Mackintosh volunteered to stay in the tent while the others attempted to take Spencer-Smith and Hayward to Hut Point. A day later Spencer-Smith died, utterly worn out by exhaustion and scurvy, and was buried in the ice. Joyce and Wild reached Hut Point with Hayward on 11 March and went back for Mackintosh.  By 16 March the whole surviving party had reached the hut.From the start of the hauling of loads from Cape Evans on 1 September 1915 to the arrival of the survivors back at Hut Point, a total of 198 days had passed, the longest sledging journey in terms of elapsed time undertaken on any expedition up to that time.

Question: How many days were they tent bound?
five