The husband missed one wife's turn. Must he make it up?

Yes. In the Shafi'i school, if a husband misses a wife's turn without a permitted excuse, he must make it up (qada').
The make-up is done by taking time from the other wives' turns until the missed wife's right is fulfilled. For example, if the husband spends the night at wife B's home on wife A's night, he must give wife A an extra night. If it was missed because of an excuse unrelated to another wife, such as being admitted to hospital, no one gained an advantage, so the cycle simply resumes. The principle is that no wife may profit from her co-wife's turn. See Fiqh of polygyny.