66603557 ÷ 198 
The aim is to understand the frequency of 198 in 66603557.

Advancing to step 1:
When dividing 6 by 198, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 198

Advancing to step 2:
198 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Grab the next digit (6) from the dividend, add it to 66, then carry on: 666 / 198

Going ahead to step 3:
198 goes into 666 3 times with a remainder of 72.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 594 away from 666, we end up with 72.
Take the next digit (0) from the dividend and append it to 72, then repeat: 720 / 198

Let's proceed to step 4:
198 goes into 720 3 times with a remainder of 126.
Use 3 as the next digit of our solution. 
Result so far: 33.0
The remainder is 126 after subtracting 594 from 720.
Fetch the next digit (3) from the dividend, attach it to 126 and continue: 1263 / 198

On to step 5:
When dividing 1263 by 198, we get 6 with a remainder of 75.
Put 6 as the next digit of the answer. 
Result so far: 336.0
If we subtract 1188 from 1263, we get 75.
Take the next digit (5) from the dividend and append it to 75, then repeat: 755 / 198

Moving on to step 6:
198 goes into 755 3 times with a remainder of 161.
Use 3 as the next digit of our solution. 
Result so far: 3363.0
If we take 594 away from 755, we end up with 161.
Take the next digit (5) from the dividend and append it to 161, then repeat: 1615 / 198

Let's proceed to step 7:
The number 198 fits into 1615 8 times, leaving a remainder of 31.
Write down 8 as next digit of the result. 
Result so far: 33638.0
If we subtract 1584 from 1615, we get 31.
Append the next digit (7) from the dividend to 31 and continue with: 317 / 198

Let's proceed to step 8:
When dividing 317 by 198, we get 1 with a remainder of 119.
The number 1 becomes the next digit in our result. 
Result so far: 336381.0
Subtracting 198 from 317 leaves us with 119.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Let's proceed to step 9:
The number 198 fits into 1190 6 times, leaving a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 336381.6
Subtracting 1188 from 1190 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 10:
If we divide 20 by 198, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 336381.6
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 11:
The number 198 fits into 200 1 times, leaving a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 336381.601
If we take 198 away from 200, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 12:
198 can be fit into 20 0 times, resulting in a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 336381.601
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 13:
198 can be fit into 200 1 times, resulting in a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 336381.60101
Subtracting 198 from 200 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 14:
If we divide 20 by 198, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 336381.60101
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 15:
When dividing 200 by 198, we get 1 with a remainder of 2.
The number 1 becomes the next digit in our result. 
Result so far: 336381.6010101
If we take 198 away from 200, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 16:
20 divided by 198 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 336381.6010101
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 336381.6010101 with a balance of 2e-08.