71844681 ÷ 45 
The aim is to understand the frequency of 45 in 71844681.

Advancing to step 1:
7 divided by 45 is 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 45

Let's proceed to step 2:
45 goes into 71 1 times with a remainder of 26.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 26 after subtracting 45 from 71.
Take the next digit (8) from the dividend and append it to 26, then repeat: 268 / 45

Going ahead to step 3:
45 goes into 268 5 times with a remainder of 43.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 225 from 268 and we're left with 43.
Take the next digit (4) from the dividend and append it to 43, then repeat: 434 / 45

Moving on to step 4:
The number 45 fits into 434 9 times, leaving a remainder of 29.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Subtracting 405 from 434 leaves us with 29.
Fetch the next digit (4) from the dividend, attach it to 29 and continue: 294 / 45

Moving on to step 5:
When dividing 294 by 45, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 1596.0
The remainder is 24 after subtracting 270 from 294.
Fetch the next digit (6) from the dividend, attach it to 24 and continue: 246 / 45

Going ahead to step 6:
246 divided by 45 is 5 with a remainder of 21.
Record the quotient 5 as the next digit in the result. 
Result so far: 15965.0
If we take 225 away from 246, we end up with 21.
Append the next digit (8) from the dividend to 21 and continue with: 218 / 45

On to step 7:
218 divided by 45 is 4 with a remainder of 38.
The next digit of our result is 4. 
Result so far: 159654.0
If we subtract 180 from 218, we get 38.
Take the next digit (1) from the dividend and append it to 38, then repeat: 381 / 45

Step 8:
If we divide 381 by 45, we get 8 and a remainder of 21.
Write down 8 as next digit of the result. 
Result so far: 1596548.0
Subtract 360 from 381 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Moving on to step 9:
45 can be fit into 210 4 times, resulting in a remainder of 30.
Write down 4 as next digit of the result. 
Result so far: 1596548.4
Deduct 180 from 210 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.

Step 10:
45 can be fit into 300 6 times, resulting in a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 1596548.46
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 11:
The number 45 fits into 300 6 times, leaving a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 1596548.466
If we subtract 270 from 300, we get 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 1596548.466, and the remainder is 0.003.