In Mosiah 21:2 it says that "after many days the Lamanites began again to be stirred up in anger." How long was this "many days"? According to the chronology in Appendix A, some 4 to 8 years could have passed since the Lamanites had come against the people of Limhi for presumably stealing their daughters (see Mosiah 20:1-11). [See Appendix A]
“Began Again to”
Occasionally the Nephites or Lamanites discontinued an action and later returned to the same activity. In eleven separate sections Mormon described this recommencing of an activity. In all but one instance he used the word combination "began again to" (Mosiah 21:2; 26:37; 27:6; Alma 1:28; 11:46; 27:2; 55:28; 59:4; Helaman 8:10; 11:36; 3 Nephi 1:23; 6:4; 4 Nephi 1:42) The exception was when he described a certain mental instead of physical activity. . . . it was only his son and companion [Moroni] who used the phrase "began again to" (Ether 9:16, 26; 10:4) . . .
Here is a small but significant fact; other authors described the same renewal of action but reversed the word combination. For example, Nephi wrote "again began to" (1 Nephi 3:31). And Zeniff also wrote "again began to" (Mosiah 10:1, 21). Some other Nephite writers just said "again" to report the return to activity. [C. Wade Brown, The First Page of the Golden Plates, p. 28]