40% or above occurrence
(N/A)
20-40% Occurring
20-0% Occurring
Gone by 4 yrs. without /s/, gone by 5 yrs. with /s
After 3 yrs
after 3.5 yrs
/f/, /s/ by 3; /v/, /z/ by 3 1/2; sh, ch, j by 4 1/2; th gone by 5
After 6 yrs w for l or r