14 And it came to pass in the thirty and first year... 17 And Nephi did minister with power and with great authority...19 And in the name of Jesus did he cast out devils and unclean spirits; and even his brother did he raise from the dead... 23 And Nephi did cry unto the people in the commencement of the thirty and third year; and he did preach unto them repentance and remission of sins... 25 Therefore, there were ordained of Nephi, men unto this ministry, that all such as should come unto them should be baptized with water
What we read here is Nephi-3 ministering in very much the same way as Jesus according to the Gospels. According to Book of Mormon time keeping, the signs of Jesus' death started in the beginning of the 34th year. So Nephi's ministry as described in this chapter lasted for about 3 years, the same as is traditionally believed about Christ. Nephi-3 seems to be portrayed as a type of Christ.