We look at the division of 31377805 by 869 
The aim is to understand the frequency of 869 in 31377805.

Moving on to step 1:
3 divided by 869 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 869

Going ahead to step 2:
869 can be fit into 31 0 times, resulting in a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Grab the next digit (3) from the dividend, add it to 31, then carry on: 313 / 869

Advancing to step 3:
If we divide 313 by 869, we get 0 and a remainder of 313.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 313, we get 313.
Append the next digit (7) from the dividend to 313 and continue with: 3137 / 869

Step 4:
When dividing 3137 by 869, we get 3 with a remainder of 530.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 2607 from 3137 and we're left with 530.
Grab the next digit (7) from the dividend, add it to 530, then carry on: 5307 / 869

Advancing to step 5:
869 can be fit into 5307 6 times, resulting in a remainder of 93.
The next digit of our result is 6. 
Result so far: 36.0
Subtract 5214 from 5307 to get 93.
Bring next digit (8) of the dividend behind the 93 and repeat the process: 938 / 869

Advancing to step 6:
938 divided by 869 is 1 with a remainder of 69.
Record the quotient 1 as the next digit in the result. 
Result so far: 361.0
Subtract 869 from 938 to get 69.
Bring next digit (0) of the dividend behind the 69 and repeat the process: 690 / 869

On to step 7:
869 goes into 690 0 times with a remainder of 690.
The number 0 becomes the next digit in our result. 
Result so far: 3610.0
Deduct 0 from 690 and we're left with 690.
Take the next digit (5) from the dividend and append it to 690, then repeat: 6905 / 869

Let's proceed to step 8:
When dividing 6905 by 869, we get 7 with a remainder of 822.
Put 7 as the next digit of the answer. 
Result so far: 36107.0
The remainder is 822 after subtracting 6083 from 6905.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8220, and continue the process.

Let's proceed to step 9:
869 goes into 8220 9 times with a remainder of 399.
Write down 9 as next digit of the result. 
Result so far: 36107.9
The remainder is 399 after subtracting 7821 from 8220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

On to step 10:
869 goes into 3990 4 times with a remainder of 514.
Use 4 as the next digit of our solution. 
Result so far: 36107.94
Subtracting 3476 from 3990 leaves us with 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

Step 11:
869 can be fit into 5140 5 times, resulting in a remainder of 795.
Use 5 as the next digit of our solution. 
Result so far: 36107.945
If we take 4345 away from 5140, we end up with 795.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7950, and continue the process.

Moving on to step 12:
7950 divided by 869 is 9 with a remainder of 129.
Use 9 as the next digit of our solution. 
Result so far: 36107.9459
Deduct 7821 from 7950 and we're left with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

On to step 13:
1290 divided by 869 is 1 with a remainder of 421.
Put 1 as the next digit of the answer. 
Result so far: 36107.94591
Subtract 869 from 1290 to get 421.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4210, and continue the process.

Step 14:
869 can be fit into 4210 4 times, resulting in a remainder of 734.
The number 4 becomes the next digit in our result. 
Result so far: 36107.945914
Subtract 3476 from 4210 to get 734.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7340, and continue the process.

Going ahead to step 15:
869 goes into 7340 8 times with a remainder of 388.
Use 8 as the next digit of our solution. 
Result so far: 36107.9459148
Subtracting 6952 from 7340 leaves us with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Going ahead to step 16:
The number 869 fits into 3880 4 times, leaving a remainder of 404.
The number 4 becomes the next digit in our result. 
Result so far: 36107.94591484
Deduct 3476 from 3880 and we're left with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

After the division, we end up with 36107.94591484 and a remainder of 4.04e-07.