He has 2 sleeps and a nap at this point. Naps have been typically anywhere between 1.5-2 hours. Nap is dependent on sleep for the day - is he has had 2 solid sleeps I'll give him a nap in the pram in afternoon while I walk and if good sleeps then quite a short nap. If poor then I'll let him sleep whole nap without waking him so that he goes to bed at a reasonable time - anywhere between 6.45pm-7.30pm these days. My son is almost 20 weeks old (tomorrow) so good point about sleep being affected by developmental leap,he has been fighting afternoon nap for a week or 2.
A typical day:
E 7.15am
A
S anywhere between 9.30am-9.50am (dependent on tired signs, he is awake anywhere between 2-2.5 hours at a time)
E 11.15am
A
S anywhere between 1.15pm-1.45pm.
E 3.15pm
A
S short nap. Anywhere between 4.40pm-5.00pm and lasting maximum of 32 minutes (seems to be my son's sleep cycle length is 32 minutes).
A
S anywhere between 6.45pm-7.30pm, no later than 7.30pm though.
E 10.30pm dreamfeed
S sleeps through until woken 7.15am most days.