We look at the division of 391917 by 29 
The aim is to understand the frequency of 29 in 391917.

Moving on to step 1:
3 divided by 29 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 29

Let's proceed to step 2:
When dividing 39 by 29, we get 1 with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 29 from 39, we get 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 29

On to step 3:
If we divide 101 by 29, we get 3 and a remainder of 14.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 87 away from 101, we end up with 14.
Include the next digit (9) from the dividend after 14, then repeat: 149 / 29

Let's proceed to step 4:
If we divide 149 by 29, we get 5 and a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 135.0
If we take 145 away from 149, we end up with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 29

Step 5:
The number 29 fits into 41 1 times, leaving a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 1351.0
Subtract 29 from 41 to get 12.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 29

Let's proceed to step 6:
The number 29 fits into 127 4 times, leaving a remainder of 11.
Use 4 as the next digit of our solution. 
Result so far: 13514.0
If we take 116 away from 127, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 7:
The number 29 fits into 110 3 times, leaving a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 13514.3
Subtract 87 from 110 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 8:
When dividing 230 by 29, we get 7 with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 13514.37
Deduct 203 from 230 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.

Step 9:
When dividing 270 by 29, we get 9 with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 13514.379
If we take 261 away from 270, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 10:
The number 29 fits into 90 3 times, leaving a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 13514.3793
If we subtract 87 from 90, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 11:
30 divided by 29 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 13514.37931
If we take 29 away from 30, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 12:
29 can be fit into 10 0 times, resulting in a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 13514.37931
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
100 divided by 29 is 3 with a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 13514.3793103
Subtracting 87 from 100 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 14:
29 can be fit into 130 4 times, resulting in a remainder of 14.
The next digit of our result is 4. 
Result so far: 13514.37931034
If we subtract 116 from 130, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 13514.37931034 with a remaining 1.4e-08.