We look at the division of 355400 by 31 
The aim is to understand the frequency of 31 in 355400.

Advancing to step 1:
31 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 31

Going ahead to step 2:
31 goes into 35 1 times with a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 31 from 35 leaves us with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 31

Step 3:
45 divided by 31 is 1 with a remainder of 14.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Deduct 31 from 45 and we're left with 14.
Fetch the next digit (4) from the dividend, attach it to 14 and continue: 144 / 31

Step 4:
31 can be fit into 144 4 times, resulting in a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 114.0
Subtract 124 from 144 to get 20.
Include the next digit (0) from the dividend after 20, then repeat: 200 / 31

Moving on to step 5:
The number 31 fits into 200 6 times, leaving a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 1146.0
Deduct 186 from 200 and we're left with 14.
Fetch the next digit (0) from the dividend, attach it to 14 and continue: 140 / 31

Let's proceed to step 6:
31 can be fit into 140 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 11464.0
If we subtract 124 from 140, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 7:
When dividing 160 by 31, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 11464.5
Subtract 155 from 160 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
The number 31 fits into 50 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 11464.51
The remainder is 19 after subtracting 31 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 9:
If we divide 190 by 31, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 11464.516
If we subtract 186 from 190, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 10:
The number 31 fits into 40 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 11464.5161
Subtract 31 from 40 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 11:
The number 31 fits into 90 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 11464.51612
If we take 62 away from 90, 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.

Step 12:
31 goes into 280 9 times with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 11464.516129
If we take 279 away from 280, 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.

Advancing to step 13:
31 goes into 10 0 times with a remainder of 10.
The next digit of our result is 0. 
Result so far: 11464.516129
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
When dividing 100 by 31, we get 3 with a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 11464.51612903
If we take 93 away from 100, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 11464.51612903 with a remaining 7e-09.