Let's divide 86187098 by 639
The aim is to understand the frequency of 639 in 86187098.

On to step 1:
8 divided by 639 is 0 with 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.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 639

Moving on to step 2:
The number 639 fits into 86 0 times, leaving a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Take the next digit (1) from the dividend and append it to 86, then repeat: 861 / 639

Let's proceed to step 3:
If we divide 861 by 639, we get 1 and a remainder of 222.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 639 away from 861, we end up with 222.
Bring next digit (8) of the dividend behind the 222 and repeat the process: 2228 / 639

Advancing to step 4:
639 goes into 2228 3 times with a remainder of 311.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtract 1917 from 2228 to get 311.
Include the next digit (7) from the dividend after 311, then repeat: 3117 / 639

Going ahead to step 5:
The number 639 fits into 3117 4 times, leaving a remainder of 561.
The next digit of our result is 4. 
Result so far: 134.0
The remainder is 561 after subtracting 2556 from 3117.
Fetch the next digit (0) from the dividend, attach it to 561 and continue: 5610 / 639

On to step 6:
639 goes into 5610 8 times with a remainder of 498.
The number 8 becomes the next digit in our result. 
Result so far: 1348.0
Subtract 5112 from 5610 to get 498.
Bring next digit (9) of the dividend behind the 498 and repeat the process: 4989 / 639

Step 7:
When dividing 4989 by 639, we get 7 with a remainder of 516.
Use 7 as the next digit of our solution. 
Result so far: 13487.0
Subtract 4473 from 4989 to get 516.
Grab the next digit (8) from the dividend, add it to 516, then carry on: 5168 / 639

Going ahead to step 8:
If we divide 5168 by 639, we get 8 and a remainder of 56.
The next digit of our result is 8. 
Result so far: 134878.0
If we take 5112 away from 5168, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 9:
If we divide 560 by 639, we get 0 and a remainder of 560.
The number 0 becomes the next digit in our result. 
Result so far: 134878.0
If we subtract 0 from 560, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Advancing to step 10:
If we divide 5600 by 639, we get 8 and a remainder of 488.
Use 8 as the next digit of our solution. 
Result so far: 134878.08
The remainder is 488 after subtracting 5112 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Moving on to step 11:
The number 639 fits into 4880 7 times, leaving a remainder of 407.
Record the quotient 7 as the next digit in the result. 
Result so far: 134878.087
If we take 4473 away from 4880, we end up with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Advancing to step 12:
639 goes into 4070 6 times with a remainder of 236.
Use 6 as the next digit of our solution. 
Result so far: 134878.0876
The remainder is 236 after subtracting 3834 from 4070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Moving on to step 13:
If we divide 2360 by 639, we get 3 and a remainder of 443.
Use 3 as the next digit of our solution. 
Result so far: 134878.08763
If we take 1917 away from 2360, we end up with 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

Advancing to step 14:
If we divide 4430 by 639, we get 6 and a remainder of 596.
Use 6 as the next digit of our solution. 
Result so far: 134878.087636
If we subtract 3834 from 4430, we get 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Moving on to step 15:
If we divide 5960 by 639, we get 9 and a remainder of 209.
The number 9 becomes the next digit in our result. 
Result so far: 134878.0876369
If we take 5751 away from 5960, we end up with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Let's proceed to step 16:
639 can be fit into 2090 3 times, resulting in a remainder of 173.
Record the quotient 3 as the next digit in the result. 
Result so far: 134878.08763693
If we take 1917 away from 2090, we end up with 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Our division results in 134878.08763693 with a remaining 1.73e-07.