135426 ÷ 45 
The aim is to understand the frequency of 45 in 135426.

Let's proceed to step 1:
If we divide 1 by 45, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 45

On to step 2:
13 divided by 45 is 0 with a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 45

Let's proceed to step 3:
45 goes into 135 3 times with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 135 from 135 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 45

Moving on to step 4:
The number 45 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 30.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 45

Step 5:
42 divided by 45 is 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 300.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (6) from the dividend, attach it to 42 and continue: 426 / 45

Advancing to step 6:
When dividing 426 by 45, we get 9 with a remainder of 21.
Put 9 as the next digit of the answer. 
Result so far: 3009.0
Deduct 405 from 426 and we're left with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 7:
45 can be fit into 210 4 times, resulting in a remainder of 30.
Use 4 as the next digit of our solution. 
Result so far: 3009.4
If we take 180 away from 210, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 8:
If we divide 300 by 45, we get 6 and a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 3009.46
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
When dividing 300 by 45, we get 6 with a remainder of 30.
The number 6 becomes the next digit in our result. 
Result so far: 3009.466
If we take 270 away from 300, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The quotient of the division is 3009.466, and the remainder is 0.003.