We're dividing 218598 by 45 
The aim is to understand the frequency of 45 in 218598.

Advancing to step 1:
If we divide 2 by 45, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 45

Step 2:
If we divide 21 by 45, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Bring next digit (8) of the dividend behind the 21 and repeat the process: 218 / 45

Let's proceed to step 3:
45 can be fit into 218 4 times, resulting in a remainder of 38.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 180 from 218 and we're left with 38.
Include the next digit (5) from the dividend after 38, then repeat: 385 / 45

Moving on to step 4:
If we divide 385 by 45, we get 8 and a remainder of 25.
Put 8 as the next digit of the answer. 
Result so far: 48.0
Deduct 360 from 385 and we're left with 25.
Grab the next digit (9) from the dividend, add it to 25, then carry on: 259 / 45

Advancing to step 5:
The number 45 fits into 259 5 times, leaving a remainder of 34.
Write down 5 as next digit of the result. 
Result so far: 485.0
If we take 225 away from 259, we end up with 34.
Append the next digit (8) from the dividend to 34 and continue with: 348 / 45

On to step 6:
The number 45 fits into 348 7 times, leaving a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 4857.0
Deduct 315 from 348 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Let's proceed to step 7:
If we divide 330 by 45, we get 7 and a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 4857.7
If we take 315 away from 330, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 8:
45 can be fit into 150 3 times, resulting in a remainder of 15.
The next digit of our result is 3. 
Result so far: 4857.73
If we take 135 away from 150, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 9:
45 goes into 150 3 times with a remainder of 15.
The next digit of our result is 3. 
Result so far: 4857.733
Subtract 135 from 150 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 4857.733 and a remainder of 0.0015.