91278561 ÷ 498 
The aim is to understand the frequency of 498 in 91278561.

Step 1:
If we divide 9 by 498, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 498

On to step 2:
498 can be fit into 91 0 times, resulting in a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Include the next digit (2) from the dividend after 91, then repeat: 912 / 498

Going ahead to step 3:
If we divide 912 by 498, we get 1 and a remainder of 414.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 498 from 912 to get 414.
Fetch the next digit (7) from the dividend, attach it to 414 and continue: 4147 / 498

Step 4:
The number 498 fits into 4147 8 times, leaving a remainder of 163.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we take 3984 away from 4147, we end up with 163.
Append the next digit (8) from the dividend to 163 and continue with: 1638 / 498

Let's proceed to step 5:
The number 498 fits into 1638 3 times, leaving a remainder of 144.
Write down 3 as next digit of the result. 
Result so far: 183.0
If we take 1494 away from 1638, we end up with 144.
Take the next digit (5) from the dividend and append it to 144, then repeat: 1445 / 498

Let's proceed to step 6:
When dividing 1445 by 498, we get 2 with a remainder of 449.
Use 2 as the next digit of our solution. 
Result so far: 1832.0
Subtract 996 from 1445 to get 449.
Append the next digit (6) from the dividend to 449 and continue with: 4496 / 498

Step 7:
498 goes into 4496 9 times with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 18329.0
Subtract 4482 from 4496 to get 14.
Append the next digit (1) from the dividend to 14 and continue with: 141 / 498

On to step 8:
The number 498 fits into 141 0 times, leaving a remainder of 141.
Use 0 as the next digit of our solution. 
Result so far: 183290.0
If we take 0 away from 141, we end up with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Going ahead to step 9:
498 can be fit into 1410 2 times, resulting in a remainder of 414.
The next digit of our result is 2. 
Result so far: 183290.2
The remainder is 414 after subtracting 996 from 1410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Step 10:
4140 divided by 498 is 8 with a remainder of 156.
Write down 8 as next digit of the result. 
Result so far: 183290.28
The remainder is 156 after subtracting 3984 from 4140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 11:
If we divide 1560 by 498, we get 3 and a remainder of 66.
Put 3 as the next digit of the answer. 
Result so far: 183290.283
If we take 1494 away from 1560, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 12:
If we divide 660 by 498, we get 1 and a remainder of 162.
Write down 1 as next digit of the result. 
Result so far: 183290.2831
Subtracting 498 from 660 leaves us with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Moving on to step 13:
498 can be fit into 1620 3 times, resulting in a remainder of 126.
The next digit of our result is 3. 
Result so far: 183290.28313
Deduct 1494 from 1620 and we're left with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Let's proceed to step 14:
1260 divided by 498 is 2 with a remainder of 264.
Use 2 as the next digit of our solution. 
Result so far: 183290.283132
Subtract 996 from 1260 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Let's proceed to step 15:
If we divide 2640 by 498, we get 5 and a remainder of 150.
Record the quotient 5 as the next digit in the result. 
Result so far: 183290.2831325
If we subtract 2490 from 2640, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 16:
The number 498 fits into 1500 3 times, leaving a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 183290.28313253
Subtract 1494 from 1500 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

The final result is 183290.28313253 with a remainder of 6e-09.