391957 ÷ 29 
The aim is to understand the frequency of 29 in 391957.

Advancing to step 1:
29 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 29

Advancing to step 2:
The number 29 fits into 39 1 times, leaving a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 29 from 39 leaves us with 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 29

Moving on to step 3:
101 divided by 29 is 3 with a remainder of 14.
Use 3 as the next digit of our solution. 
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

Advancing to step 4:
29 can be fit into 149 5 times, resulting in a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 135.0
The remainder is 4 after subtracting 145 from 149.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 29

Let's proceed to step 5:
When dividing 45 by 29, we get 1 with a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 1351.0
Subtracting 29 from 45 leaves us with 16.
Include the next digit (7) from the dividend after 16, then repeat: 167 / 29

On to step 6:
29 goes into 167 5 times with a remainder of 22.
Use 5 as the next digit of our solution. 
Result so far: 13515.0
Subtracting 145 from 167 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 7:
29 can be fit into 220 7 times, resulting in a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 13515.7
Subtract 203 from 220 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 8:
If we divide 170 by 29, we get 5 and a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 13515.75
If we subtract 145 from 170, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 9:
29 can be fit into 250 8 times, resulting in a remainder of 18.
The next digit of our result is 8. 
Result so far: 13515.758
Subtract 232 from 250 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 10:
29 can be fit into 180 6 times, resulting in a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 13515.7586
Subtract 174 from 180 to get 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:
60 divided by 29 is 2 with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 13515.75862
Subtracting 58 from 60 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 12:
29 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 13515.75862
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 13:
The number 29 fits into 200 6 times, leaving a remainder of 26.
Write down 6 as next digit of the result. 
Result so far: 13515.7586206
If we take 174 away from 200, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 14:
29 can be fit into 260 8 times, resulting in a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 13515.75862068
If we take 232 away from 260, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

After the division, we end up with 13515.75862068 and a remainder of 2.8e-08.