It varies baby to baby, tooth to tooth! Dd started getting teeth poking out at 2 mos but you could actually see the whole tooth at 3 mos... The other teeth usually came in within days of popping through!!
Depends on the child and varies drastically my dd didn't get her first tooth til about a week before her first birthday and it took three months to come in and now at 15 months she has six teeth and one that has been coming in for a few weeks.