89909347 divided by 45 
The aim is to understand the frequency of 45 in 89909347.

Advancing to step 1:
8 divided by 45 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (9) from the dividend and append it to 8, then repeat: 89 / 45

Step 2:
If we divide 89 by 45, we get 1 and a remainder of 44.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 45 from 89 leaves us with 44.
Fetch the next digit (9) from the dividend, attach it to 44 and continue: 449 / 45

Step 3:
45 goes into 449 9 times with a remainder of 44.
Write down 9 as next digit of the result. 
Result so far: 19.0
Deduct 405 from 449 and we're left with 44.
Append the next digit (0) from the dividend to 44 and continue with: 440 / 45

Let's proceed to step 4:
45 can be fit into 440 9 times, resulting in a remainder of 35.
The number 9 becomes the next digit in our result. 
Result so far: 199.0
Subtracting 405 from 440 leaves us with 35.
Take the next digit (9) from the dividend and append it to 35, then repeat: 359 / 45

Step 5:
When dividing 359 by 45, we get 7 with a remainder of 44.
Put 7 as the next digit of the answer. 
Result so far: 1997.0
The remainder is 44 after subtracting 315 from 359.
Append the next digit (3) from the dividend to 44 and continue with: 443 / 45

Advancing to step 6:
45 goes into 443 9 times with a remainder of 38.
Write down 9 as next digit of the result. 
Result so far: 19979.0
If we subtract 405 from 443, we get 38.
Grab the next digit (4) from the dividend, add it to 38, then carry on: 384 / 45

Step 7:
45 can be fit into 384 8 times, resulting in a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 199798.0
If we take 360 away from 384, we end up with 24.
Fetch the next digit (7) from the dividend, attach it to 24 and continue: 247 / 45

Moving on to step 8:
The number 45 fits into 247 5 times, leaving a remainder of 22.
The next digit of our result is 5. 
Result so far: 1997985.0
Deduct 225 from 247 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 9:
45 goes into 220 4 times with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 1997985.4
The remainder is 40 after subtracting 180 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
45 goes into 400 8 times with a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 1997985.48
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
The number 45 fits into 400 8 times, leaving a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 1997985.488
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 1997985.488 with a remainder of 0.004.