Around 4 months of age, your Lab puppy will begin replacing the milk teeth with adult teeth. At 6 to 7 months, the full set of 42 permanent teeth will be in.
(plural strike rates) ( 1 baseball) the number of runs of a batter divided by the number of balls faced. ( 2 cricket) the number of runs scored by a batsman per 100 balls faced; the number of balls bowled by a bowler divided by the number of wickets taken.  Link/Cite.
Churn Rate. The rate at which customers terminate their relationships with a company over a given period of time. For example, if five customers in 50 discontinue their cable every month, the churn rate is 5%. The church rate contrasts with the growth rate, which, in this case, is defined as the number of new clients or customers. If a company is to grow, the growth rate must consistently exceed the churn rate.