We divide 354980 by 31
The aim is to understand the frequency of 31 in 354980.

On to step 1:
31 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 31

Advancing to step 2:
When dividing 35 by 31, we get 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 31 from 35 leaves us with 4.
Append the next digit (4) from the dividend to 4 and continue with: 44 / 31

Step 3:
31 can be fit into 44 1 times, resulting in a remainder of 13.
Write down 1 as next digit of the result. 
Result so far: 11.0
If we take 31 away from 44, we end up with 13.
Bring next digit (9) of the dividend behind the 13 and repeat the process: 139 / 31

Going ahead to step 4:
The number 31 fits into 139 4 times, leaving a remainder of 15.
Write down 4 as next digit of the result. 
Result so far: 114.0
Subtract 124 from 139 to get 15.
Bring next digit (8) of the dividend behind the 15 and repeat the process: 158 / 31

Step 5:
158 divided by 31 is 5 with a remainder of 3.
The next digit of our result is 5. 
Result so far: 1145.0
Subtracting 155 from 158 leaves us with 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 31

Moving on to step 6:
31 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 11450.0
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 7:
300 divided by 31 is 9 with a remainder of 21.
Use 9 as the next digit of our solution. 
Result so far: 11450.9
The remainder is 21 after subtracting 279 from 300.
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 8:
The number 31 fits into 210 6 times, leaving a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 11450.96
If we take 186 away from 210, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 9:
If we divide 240 by 31, we get 7 and a remainder of 23.
Write down 7 as next digit of the result. 
Result so far: 11450.967
If we subtract 217 from 240, we 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.

Let's proceed to step 10:
If we divide 230 by 31, we get 7 and a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 11450.9677
Subtracting 217 from 230 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.

After the division, we end up with 11450.9677 and a remainder of 0.00013.