86825988 ÷ 640 
The aim is to understand the frequency of 640 in 86825988.

Going ahead to step 1:
640 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
Subtracting 0 from 8 leaves us with 8.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 640

Advancing to step 2:
640 goes into 86 0 times 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.
Grab the next digit (8) from the dividend, add it to 86, then carry on: 868 / 640

Moving on to step 3:
640 goes into 868 1 times with a remainder of 228.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 640 from 868 to get 228.
Fetch the next digit (2) from the dividend, attach it to 228 and continue: 2282 / 640

Advancing to step 4:
640 goes into 2282 3 times with a remainder of 362.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 1920 from 2282 and we're left with 362.
Include the next digit (5) from the dividend after 362, then repeat: 3625 / 640

On to step 5:
640 can be fit into 3625 5 times, resulting in a remainder of 425.
Record the quotient 5 as the next digit in the result. 
Result so far: 135.0
Subtract 3200 from 3625 to get 425.
Bring next digit (9) of the dividend behind the 425 and repeat the process: 4259 / 640

Advancing to step 6:
If we divide 4259 by 640, we get 6 and a remainder of 419.
Record the quotient 6 as the next digit in the result. 
Result so far: 1356.0
Deduct 3840 from 4259 and we're left with 419.
Grab the next digit (8) from the dividend, add it to 419, then carry on: 4198 / 640

Moving on to step 7:
640 can be fit into 4198 6 times, resulting in a remainder of 358.
Use 6 as the next digit of our solution. 
Result so far: 13566.0
Subtracting 3840 from 4198 leaves us with 358.
Take the next digit (8) from the dividend and append it to 358, then repeat: 3588 / 640

Going ahead to step 8:
640 goes into 3588 5 times with a remainder of 388.
Use 5 as the next digit of our solution. 
Result so far: 135665.0
Subtracting 3200 from 3588 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.

Moving on to step 9:
The number 640 fits into 3880 6 times, leaving a remainder of 40.
Write down 6 as next digit of the result. 
Result so far: 135665.6
Subtract 3840 from 3880 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
640 goes into 400 0 times with a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 135665.6
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Moving on to step 11:
When dividing 4000 by 640, we get 6 with a remainder of 160.
Record the quotient 6 as the next digit in the result. 
Result so far: 135665.606
If we subtract 3840 from 4000, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 12:
If we divide 1600 by 640, we get 2 and a remainder of 320.
The next digit of our result is 2. 
Result so far: 135665.6062
Subtract 1280 from 1600 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 13:
640 goes into 3200 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 135665.60625
If we subtract 3200 from 3200, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 14:
640 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 135665.60625
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 15:
If we divide 0 by 640, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 135665.60625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 135665.60625 with a remainder of 0.0.