Let's divide 86681098 by 639
The aim is to understand the frequency of 639 in 86681098.

On to step 1:
639 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 639

Step 2:
When dividing 86 by 639, we get 0 with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 86 leaves us with 86.
Append the next digit (6) from the dividend to 86 and continue with: 866 / 639

Let's proceed to step 3:
When dividing 866 by 639, we get 1 with a remainder of 227.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 227 after subtracting 639 from 866.
Grab the next digit (8) from the dividend, add it to 227, then carry on: 2278 / 639

Step 4:
The number 639 fits into 2278 3 times, leaving a remainder of 361.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
The remainder is 361 after subtracting 1917 from 2278.
Grab the next digit (1) from the dividend, add it to 361, then carry on: 3611 / 639

Going ahead to step 5:
If we divide 3611 by 639, we get 5 and a remainder of 416.
The next digit of our result is 5. 
Result so far: 135.0
Subtract 3195 from 3611 to get 416.
Grab the next digit (0) from the dividend, add it to 416, then carry on: 4160 / 639

Going ahead to step 6:
The number 639 fits into 4160 6 times, leaving a remainder of 326.
Use 6 as the next digit of our solution. 
Result so far: 1356.0
The remainder is 326 after subtracting 3834 from 4160.
Grab the next digit (9) from the dividend, add it to 326, then carry on: 3269 / 639

Let's proceed to step 7:
The number 639 fits into 3269 5 times, leaving a remainder of 74.
Write down 5 as next digit of the result. 
Result so far: 13565.0
Subtracting 3195 from 3269 leaves us with 74.
Fetch the next digit (8) from the dividend, attach it to 74 and continue: 748 / 639

Advancing to step 8:
639 goes into 748 1 times with a remainder of 109.
Put 1 as the next digit of the answer. 
Result so far: 135651.0
Deduct 639 from 748 and we're left with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

Advancing to step 9:
639 goes into 1090 1 times with a remainder of 451.
Put 1 as the next digit of the answer. 
Result so far: 135651.1
Deduct 639 from 1090 and we're left with 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

On to step 10:
639 can be fit into 4510 7 times, resulting in a remainder of 37.
Use 7 as the next digit of our solution. 
Result so far: 135651.17
If we take 4473 away from 4510, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 11:
370 divided by 639 is 0 with a remainder of 370.
The next digit of our result is 0. 
Result so far: 135651.17
Deduct 0 from 370 and we're left with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 12:
639 goes into 3700 5 times with a remainder of 505.
Record the quotient 5 as the next digit in the result. 
Result so far: 135651.1705
If we take 3195 away from 3700, we end up with 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Step 13:
When dividing 5050 by 639, we get 7 with a remainder of 577.
Write down 7 as next digit of the result. 
Result so far: 135651.17057
If we take 4473 away from 5050, we end up with 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Moving on to step 14:
If we divide 5770 by 639, we get 9 and a remainder of 19.
The number 9 becomes the next digit in our result. 
Result so far: 135651.170579
The remainder is 19 after subtracting 5751 from 5770.
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 15:
When dividing 190 by 639, we get 0 with a remainder of 190.
Write down 0 as next digit of the result. 
Result so far: 135651.170579
Deduct 0 from 190 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

On to step 16:
When dividing 1900 by 639, we get 2 with a remainder of 622.
The next digit of our result is 2. 
Result so far: 135651.17057902
If we subtract 1278 from 1900, we get 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

The quotient of the division is 135651.17057902, and the remainder is 6.22e-07.