86662913 ÷ 131 
The aim is to understand the frequency of 131 in 86662913.

Step 1:
131 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 131

Step 2:
When dividing 86 by 131, we get 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Include the next digit (6) from the dividend after 86, then repeat: 866 / 131

Step 3:
The number 131 fits into 866 6 times, leaving a remainder of 80.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtract 786 from 866 to get 80.
Include the next digit (6) from the dividend after 80, then repeat: 806 / 131

On to step 4:
When dividing 806 by 131, we get 6 with a remainder of 20.
The next digit of our result is 6. 
Result so far: 66.0
Subtracting 786 from 806 leaves us with 20.
Grab the next digit (2) from the dividend, add it to 20, then carry on: 202 / 131

Let's proceed to step 5:
202 divided by 131 is 1 with a remainder of 71.
Record the quotient 1 as the next digit in the result. 
Result so far: 661.0
The remainder is 71 after subtracting 131 from 202.
Take the next digit (9) from the dividend and append it to 71, then repeat: 719 / 131

Step 6:
719 divided by 131 is 5 with a remainder of 64.
Use 5 as the next digit of our solution. 
Result so far: 6615.0
If we take 655 away from 719, we end up with 64.
Grab the next digit (1) from the dividend, add it to 64, then carry on: 641 / 131

On to step 7:
131 can be fit into 641 4 times, resulting in a remainder of 117.
Record the quotient 4 as the next digit in the result. 
Result so far: 66154.0
Subtracting 524 from 641 leaves us with 117.
Include the next digit (3) from the dividend after 117, then repeat: 1173 / 131

Advancing to step 8:
1173 divided by 131 is 8 with a remainder of 125.
The number 8 becomes the next digit in our result. 
Result so far: 661548.0
Deduct 1048 from 1173 and we're left with 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Advancing to step 9:
131 can be fit into 1250 9 times, resulting in a remainder of 71.
The number 9 becomes the next digit in our result. 
Result so far: 661548.9
If we take 1179 away from 1250, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 10:
710 divided by 131 is 5 with a remainder of 55.
The next digit of our result is 5. 
Result so far: 661548.95
The remainder is 55 after subtracting 655 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 11:
If we divide 550 by 131, we get 4 and a remainder of 26.
Write down 4 as next digit of the result. 
Result so far: 661548.954
Subtract 524 from 550 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 12:
The number 131 fits into 260 1 times, leaving a remainder of 129.
Use 1 as the next digit of our solution. 
Result so far: 661548.9541
Subtract 131 from 260 to get 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:
If we divide 1290 by 131, we get 9 and a remainder of 111.
Write down 9 as next digit of the result. 
Result so far: 661548.95419
If we take 1179 away from 1290, we end up with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Let's proceed to step 14:
131 can be fit into 1110 8 times, resulting in a remainder of 62.
The next digit of our result is 8. 
Result so far: 661548.954198
Deduct 1048 from 1110 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 15:
620 divided by 131 is 4 with a remainder of 96.
The next digit of our result is 4. 
Result so far: 661548.9541984
Subtracting 524 from 620 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 16:
131 goes into 960 7 times with a remainder of 43.
Use 7 as the next digit of our solution. 
Result so far: 661548.95419847
The remainder is 43 after subtracting 917 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

The final result is 661548.95419847 with a remainder of 4.3e-08.