18990633 ÷ 538 
The aim is to understand the frequency of 538 in 18990633.

Step 1:
538 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 538

Step 2:
When dividing 18 by 538, we get 0 with a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Take the next digit (9) from the dividend and append it to 18, then repeat: 189 / 538

On to step 3:
189 divided by 538 is 0 with a remainder of 189.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 189 leaves us with 189.
Take the next digit (9) from the dividend and append it to 189, then repeat: 1899 / 538

Advancing to step 4:
If we divide 1899 by 538, we get 3 and a remainder of 285.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 1614 from 1899, we get 285.
Append the next digit (0) from the dividend to 285 and continue with: 2850 / 538

Step 5:
If we divide 2850 by 538, we get 5 and a remainder of 160.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Subtract 2690 from 2850 to get 160.
Grab the next digit (6) from the dividend, add it to 160, then carry on: 1606 / 538

Going ahead to step 6:
When dividing 1606 by 538, we get 2 with a remainder of 530.
Use 2 as the next digit of our solution. 
Result so far: 352.0
Subtracting 1076 from 1606 leaves us with 530.
Fetch the next digit (3) from the dividend, attach it to 530 and continue: 5303 / 538

Let's proceed to step 7:
When dividing 5303 by 538, we get 9 with a remainder of 461.
Use 9 as the next digit of our solution. 
Result so far: 3529.0
If we take 4842 away from 5303, we end up with 461.
Grab the next digit (3) from the dividend, add it to 461, then carry on: 4613 / 538

Step 8:
If we divide 4613 by 538, we get 8 and a remainder of 309.
The number 8 becomes the next digit in our result. 
Result so far: 35298.0
Deduct 4304 from 4613 and we're left with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Advancing to step 9:
When dividing 3090 by 538, we get 5 with a remainder of 400.
Use 5 as the next digit of our solution. 
Result so far: 35298.5
Deduct 2690 from 3090 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.

Going ahead to step 10:
538 can be fit into 4000 7 times, resulting in a remainder of 234.
The next digit of our result is 7. 
Result so far: 35298.57
If we take 3766 away from 4000, we end up with 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

On to step 11:
538 can be fit into 2340 4 times, resulting in a remainder of 188.
The next digit of our result is 4. 
Result so far: 35298.574
If we subtract 2152 from 2340, we get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Going ahead to step 12:
If we divide 1880 by 538, we get 3 and a remainder of 266.
The next digit of our result is 3. 
Result so far: 35298.5743
Subtract 1614 from 1880 to get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

On to step 13:
If we divide 2660 by 538, we get 4 and a remainder of 508.
Use 4 as the next digit of our solution. 
Result so far: 35298.57434
The remainder is 508 after subtracting 2152 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

Moving on to step 14:
If we divide 5080 by 538, we get 9 and a remainder of 238.
Record the quotient 9 as the next digit in the result. 
Result so far: 35298.574349
Deduct 4842 from 5080 and we're left with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Let's proceed to step 15:
If we divide 2380 by 538, we get 4 and a remainder of 228.
Put 4 as the next digit of the answer. 
Result so far: 35298.5743494
The remainder is 228 after subtracting 2152 from 2380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 16:
If we divide 2280 by 538, we get 4 and a remainder of 128.
Put 4 as the next digit of the answer. 
Result so far: 35298.57434944
The remainder is 128 after subtracting 2152 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

The quotient of the division is 35298.57434944, and the remainder is 1.28e-07.