15499098 ÷ 640 
The aim is to understand the frequency of 640 in 15499098.

Advancing to step 1:
The number 640 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 640

Step 2:
640 can be fit into 15 0 times, resulting in a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Fetch the next digit (4) from the dividend, attach it to 15 and continue: 154 / 640

Moving on to step 3:
When dividing 154 by 640, we get 0 with a remainder of 154.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 154, we end up with 154.
Fetch the next digit (9) from the dividend, attach it to 154 and continue: 1549 / 640

Let's proceed to step 4:
The number 640 fits into 1549 2 times, leaving a remainder of 269.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 1280 from 1549 to get 269.
Include the next digit (9) from the dividend after 269, then repeat: 2699 / 640

Moving on to step 5:
640 goes into 2699 4 times with a remainder of 139.
Put 4 as the next digit of the answer. 
Result so far: 24.0
If we subtract 2560 from 2699, we get 139.
Fetch the next digit (0) from the dividend, attach it to 139 and continue: 1390 / 640

Step 6:
If we divide 1390 by 640, we get 2 and a remainder of 110.
Write down 2 as next digit of the result. 
Result so far: 242.0
Subtracting 1280 from 1390 leaves us with 110.
Fetch the next digit (9) from the dividend, attach it to 110 and continue: 1109 / 640

On to step 7:
If we divide 1109 by 640, we get 1 and a remainder of 469.
Write down 1 as next digit of the result. 
Result so far: 2421.0
Subtracting 640 from 1109 leaves us with 469.
Bring next digit (8) of the dividend behind the 469 and repeat the process: 4698 / 640

Advancing to step 8:
640 goes into 4698 7 times with a remainder of 218.
Record the quotient 7 as the next digit in the result. 
Result so far: 24217.0
If we subtract 4480 from 4698, we get 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 9:
2180 divided by 640 is 3 with a remainder of 260.
The next digit of our result is 3. 
Result so far: 24217.3
Deduct 1920 from 2180 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 10:
The number 640 fits into 2600 4 times, leaving a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 24217.34
The remainder is 40 after subtracting 2560 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
400 divided by 640 is 0 with a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 24217.34
Deduct 0 from 400 and we're left 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.

Step 12:
The number 640 fits into 4000 6 times, leaving a remainder of 160.
Put 6 as the next digit of the answer. 
Result so far: 24217.3406
If we take 3840 away from 4000, we end up with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 13:
If we divide 1600 by 640, we get 2 and a remainder of 320.
Put 2 as the next digit of the answer. 
Result so far: 24217.34062
Subtracting 1280 from 1600 leaves us with 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 14:
When dividing 3200 by 640, we get 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 24217.340625
Deduct 3200 from 3200 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 15:
640 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 24217.340625
If we take 0 away from 0, we end up with 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 16:
The number 640 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 24217.340625
Deduct 0 from 0 and we're left with 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 outcome is 24217.340625, with a leftover of 0.0.