31578873 ÷ 351 
The aim is to understand the frequency of 351 in 31578873.

On to step 1:
The number 351 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 351

Let's proceed to step 2:
If we divide 31 by 351, we get 0 and a remainder of 31.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Include the next digit (5) from the dividend after 31, then repeat: 315 / 351

Let's proceed to step 3:
351 goes into 315 0 times with a remainder of 315.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 315, we get 315.
Fetch the next digit (7) from the dividend, attach it to 315 and continue: 3157 / 351

Going ahead to step 4:
351 goes into 3157 8 times with a remainder of 349.
Write down 8 as next digit of the result. 
Result so far: 8.0
Deduct 2808 from 3157 and we're left with 349.
Grab the next digit (8) from the dividend, add it to 349, then carry on: 3498 / 351

Moving on to step 5:
3498 divided by 351 is 9 with a remainder of 339.
Write down 9 as next digit of the result. 
Result so far: 89.0
Deduct 3159 from 3498 and we're left with 339.
Fetch the next digit (8) from the dividend, attach it to 339 and continue: 3398 / 351

Advancing to step 6:
If we divide 3398 by 351, we get 9 and a remainder of 239.
The next digit of our result is 9. 
Result so far: 899.0
If we subtract 3159 from 3398, we get 239.
Grab the next digit (7) from the dividend, add it to 239, then carry on: 2397 / 351

Let's proceed to step 7:
2397 divided by 351 is 6 with a remainder of 291.
The next digit of our result is 6. 
Result so far: 8996.0
Subtract 2106 from 2397 to get 291.
Append the next digit (3) from the dividend to 291 and continue with: 2913 / 351

Advancing to step 8:
351 can be fit into 2913 8 times, resulting in a remainder of 105.
Record the quotient 8 as the next digit in the result. 
Result so far: 89968.0
The remainder is 105 after subtracting 2808 from 2913.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Advancing to step 9:
The number 351 fits into 1050 2 times, leaving a remainder of 348.
Use 2 as the next digit of our solution. 
Result so far: 89968.2
The remainder is 348 after subtracting 702 from 1050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Advancing to step 10:
The number 351 fits into 3480 9 times, leaving a remainder of 321.
Put 9 as the next digit of the answer. 
Result so far: 89968.29
If we subtract 3159 from 3480, we get 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Moving on to step 11:
3210 divided by 351 is 9 with a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 89968.299
Subtract 3159 from 3210 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Our division results in 89968.299 with a remaining 0.0051.