We look at the division of 33451661 by 126 
The aim is to understand the frequency of 126 in 33451661.

Advancing to step 1:
The number 126 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 126

Moving on to step 2:
33 divided by 126 is 0 with a remainder of 33.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 33 leaves us with 33.
Include the next digit (4) from the dividend after 33, then repeat: 334 / 126

Going ahead to step 3:
126 goes into 334 2 times with a remainder of 82.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 252 away from 334, we end up with 82.
Fetch the next digit (5) from the dividend, attach it to 82 and continue: 825 / 126

Advancing to step 4:
126 can be fit into 825 6 times, resulting in a remainder of 69.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
If we subtract 756 from 825, we get 69.
Include the next digit (1) from the dividend after 69, then repeat: 691 / 126

On to step 5:
When dividing 691 by 126, we get 5 with a remainder of 61.
Put 5 as the next digit of the answer. 
Result so far: 265.0
Deduct 630 from 691 and we're left with 61.
Fetch the next digit (6) from the dividend, attach it to 61 and continue: 616 / 126

Advancing to step 6:
If we divide 616 by 126, we get 4 and a remainder of 112.
The next digit of our result is 4. 
Result so far: 2654.0
The remainder is 112 after subtracting 504 from 616.
Take the next digit (6) from the dividend and append it to 112, then repeat: 1126 / 126

Advancing to step 7:
If we divide 1126 by 126, we get 8 and a remainder of 118.
The next digit of our result is 8. 
Result so far: 26548.0
If we subtract 1008 from 1126, we get 118.
Take the next digit (1) from the dividend and append it to 118, then repeat: 1181 / 126

Moving on to step 8:
If we divide 1181 by 126, we get 9 and a remainder of 47.
Write down 9 as next digit of the result. 
Result so far: 265489.0
If we subtract 1134 from 1181, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 9:
126 goes into 470 3 times with a remainder of 92.
Record the quotient 3 as the next digit in the result. 
Result so far: 265489.3
Subtract 378 from 470 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Going ahead to step 10:
126 can be fit into 920 7 times, resulting in a remainder of 38.
Write down 7 as next digit of the result. 
Result so far: 265489.37
Subtracting 882 from 920 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 11:
When dividing 380 by 126, we get 3 with a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 265489.373
If we take 378 away from 380, 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.

Let's proceed to step 12:
If we divide 20 by 126, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 265489.373
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.

Advancing to step 13:
126 can be fit into 200 1 times, resulting in a remainder of 74.
Use 1 as the next digit of our solution. 
Result so far: 265489.37301
The remainder is 74 after subtracting 126 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Moving on to step 14:
126 goes into 740 5 times with a remainder of 110.
Record the quotient 5 as the next digit in the result. 
Result so far: 265489.373015
If we subtract 630 from 740, we get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

On to step 15:
1100 divided by 126 is 8 with a remainder of 92.
The number 8 becomes the next digit in our result. 
Result so far: 265489.3730158
Subtracting 1008 from 1100 leaves us with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Moving on to step 16:
When dividing 920 by 126, we get 7 with a remainder of 38.
The number 7 becomes the next digit in our result. 
Result so far: 265489.37301587
Subtract 882 from 920 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Our division results in 265489.37301587 with a remaining 3.8e-08.