This is unfortunately impossible to answer, unless you choose a specific translation. In the original text, there is no word for "Let us".
In Hebrew, verbs are conjugated differently than in English, and certain future-tense conjugations are sometimes translated "let us" when rendering the text in English, but it will always be inconsistent, as is the very nature of translation.
For the number of times it appears in a specific translation, try the concordances available at www.blueletterbible.org
The word 'arise' appears 158 times in the King James version.
In the King James version
the word - he - appears 10,420 times, and is the 7th most-frequently-used word
It depends on whose English translation you look at. The words "let us" are used to translate a verb tense, and do not occur as individual words in the original Hebrew text.
95 times in the NKJV
The phrase "holy spirit" is in the King James Version of the Bible 7 times. It is in 7 verses.
none
The words, 'Holy Ghost' appear 89 times in the KJV Bible; but he cannot appear to man's eyes, as he is a Spirit and has no form. But Jesus Christ can appear anytime.
In the Gospel of John, the words Holy Spirit is used 5 times. In Johns other books (1st, 2nd, 3rd John, and Revelations) the words Holy Spirit are not used. But the word Spirit is use many times, referring to the Spirit of God or Holy Spirit, approximately 40 times in the New International Version of the Holy Bible.
There are 773,692 words in the Holy Bible. The Old Testament has 592,439 words and the New Testament has 181,253.
2
The word "holy" is in the King James Version of the Bible 611 times. It is in 544 verses.
The word 'India' occurs twice: Esther 1:1 and Esther 8:9.
1000
10 times
the word Sabbath is in the king james holy bible over 170 something times