Babies sleep for around total of 14 hours a day with 3-4 naps and at night around 8-9 hours... Feed them well at night time as they feel hungry and wake up at night... 
My baby is of 8 months and still wakes up 3 times at night

Hi mommy 
A 5 month old should be taking 3-4 naps per day for a total of 3-4 hours per day,;11-12 hours at night. 
Feed on demand, well fed baby will not have sleep disturbances 
Make time to play in the day time, once they are tired they sleep well at nights

Hello mam, my baby boy will completed 5 months on tommorow. How can my baby will sleep long ( atleast 5 hrs continuosly) in the night? Now days he sleep 3 hrs continuosly and then after every one hr he wake up. Also tell how much time baby want to sleep in whole day?