How could Joseph Smith manage to seamlessly use the symbolic number 10 while dictating?

The number 10 is quite significant in scripture and signifies completeness. For example:

A tenth part in tithing (Genesis 28:22)
Laban changed Jacob’s wages 10 times (Genesis 31:7, 41)
10 plagues of Egypt (Exodus 7-11)
The 10 Commandments (Exodus 20)
Tenfold elements in the construction of the tabernacle (Exodus 26:1)
The Priestly Decalogue (Exodus 34)
Israel rebelled against God 10 times in the wilderness (Numbers 14:22)
Tenfold elements in the construction of Solomon’s temple (1 Kings 6:23–25)
Jeremiah prayed for 10 days (Jeremiah 42:7)
10 horns in Daniel’s vision (Daniel 7:7)
Parable of the 10 virgins (Matthew 25:1-13)
The woman’s 10 pieces of silver (Luke 15:8–10)
10 lepers (Luke 17:11–18)
10 servants and pounds in the parable of the pounds (Luke 19:13-25)
Paul’s list of 10 prohibitions (1 Corinthians 6:9–10)

John W. Welch points out similar uses of 10 in the Book of Mormon:

The number of times Nephi mentions the Lord in his psalm (2 Nephi 4)
The number of times Jacob mentions the Lord in his covenant speech (2 Nephi 9)
Jacob’s 10 woes (2 Nephi 9:27–38)
The number of times King Benjamin mentions the Lord in his sermon (Mosiah 3)
Ten terms used for the Son of God in King Benjamin’s sermon (Mosiah 3:8 and exactly the same in Helaman 14:12)
The number of times Alma mentions the Lord in his speech (Alma 12-13)
The number of times Alma mentions the Son in his speech (Alma 12-13)
The number of times Alma mentions “O Lord” in his prayer (Alma 31:26–35)
The number of times Zenos mentions hearing (Alma 33:4–11)
The number of times Nephi mentions the Lord in his prayers (Helaman 11:4, 10–16)
Tenfold call to repentance (3 Nephi 20:2)

Welch concludes:

The number ten seems to have been significant in the ancient world, especially in Israelite religious literature. Ten conveyed a tight cluster of symbolic messages associated with the divine realms, namely, completeness, perfection, worthiness, consecration, testing, justice, reverence, atonement, supplication, and holiness (to mention ten). Regardless of whether all ten of these meanings were overtly intentional or only unconsciously subliminal in any particular text, it seems clear that in-group audiences knew enough to look for these messages in pondering the scriptures. In most cases, these meanings are rooted in very early Israelite texts. Detecting these tenfold occurrences in the Book of Mormon uncovers a previously unnoticed ancient quality of Nephite scripture that was probably more obvious to ancient minds than it is to modern readers.
– John W. Welch – Counting to Ten

Wouldn’t it have been difficult for Joseph Smith to seamlessly use the number 10 like this while dictating?

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