We look at the division of 784101 by 51 
The aim is to understand the frequency of 51 in 784101.

Moving on to step 1:
If we divide 7 by 51, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 51

Moving on to step 2:
78 divided by 51 is 1 with a remainder of 27.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 51 away from 78, we end up with 27.
Include the next digit (4) from the dividend after 27, then repeat: 274 / 51

On to step 3:
51 can be fit into 274 5 times, resulting in a remainder of 19.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 19 after subtracting 255 from 274.
Include the next digit (1) from the dividend after 19, then repeat: 191 / 51

Step 4:
When dividing 191 by 51, we get 3 with a remainder of 38.
The number 3 becomes the next digit in our result. 
Result so far: 153.0
If we subtract 153 from 191, we get 38.
Include the next digit (0) from the dividend after 38, then repeat: 380 / 51

Going ahead to step 5:
The number 51 fits into 380 7 times, leaving a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 1537.0
If we subtract 357 from 380, we get 23.
Include the next digit (1) from the dividend after 23, then repeat: 231 / 51

Let's proceed to step 6:
51 goes into 231 4 times with a remainder of 27.
Write down 4 as next digit of the result. 
Result so far: 15374.0
Deduct 204 from 231 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
270 divided by 51 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 15374.5
Subtracting 255 from 270 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 8:
When dividing 150 by 51, we get 2 with a remainder of 48.
Use 2 as the next digit of our solution. 
Result so far: 15374.52
Deduct 102 from 150 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 9:
480 divided by 51 is 9 with a remainder of 21.
The number 9 becomes the next digit in our result. 
Result so far: 15374.529
Subtract 459 from 480 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 10:
210 divided by 51 is 4 with a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 15374.5294
Subtracting 204 from 210 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
51 can be fit into 60 1 times, resulting in a remainder of 9.
The next digit of our result is 1. 
Result so far: 15374.52941
The remainder is 9 after subtracting 51 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 12:
The number 51 fits into 90 1 times, leaving a remainder of 39.
Use 1 as the next digit of our solution. 
Result so far: 15374.529411
If we take 51 away from 90, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Our division results in 15374.529411 with a remaining 3.9e-06.