86904063 divided by 625 
The aim is to understand the frequency of 625 in 86904063.

Let's proceed to step 1:
If we divide 8 by 625, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 625

Step 2:
86 divided by 625 is 0 with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Include the next digit (9) from the dividend after 86, then repeat: 869 / 625

Moving on to step 3:
625 goes into 869 1 times with a remainder of 244.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 625 from 869 to get 244.
Take the next digit (0) from the dividend and append it to 244, then repeat: 2440 / 625

Moving on to step 4:
If we divide 2440 by 625, we get 3 and a remainder of 565.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Deduct 1875 from 2440 and we're left with 565.
Take the next digit (4) from the dividend and append it to 565, then repeat: 5654 / 625

Let's proceed to step 5:
The number 625 fits into 5654 9 times, leaving a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 139.0
Subtract 5625 from 5654 to get 29.
Fetch the next digit (0) from the dividend, attach it to 29 and continue: 290 / 625

On to step 6:
The number 625 fits into 290 0 times, leaving a remainder of 290.
The next digit of our result is 0. 
Result so far: 1390.0
The remainder is 290 after subtracting 0 from 290.
Grab the next digit (6) from the dividend, add it to 290, then carry on: 2906 / 625

Step 7:
625 can be fit into 2906 4 times, resulting in a remainder of 406.
The next digit of our result is 4. 
Result so far: 13904.0
Subtract 2500 from 2906 to get 406.
Bring next digit (3) of the dividend behind the 406 and repeat the process: 4063 / 625

Going ahead to step 8:
When dividing 4063 by 625, we get 6 with a remainder of 313.
Use 6 as the next digit of our solution. 
Result so far: 139046.0
The remainder is 313 after subtracting 3750 from 4063.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Going ahead to step 9:
3130 divided by 625 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 139046.5
If we take 3125 away from 3130, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 10:
If we divide 50 by 625, we get 0 and a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 139046.5
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 11:
The number 625 fits into 500 0 times, leaving a remainder of 500.
Put 0 as the next digit of the answer. 
Result so far: 139046.5
Deduct 0 from 500 and we're left with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Our division results in 139046.5 with a remaining 0.05.