We're dividing 55575524 by 551 
The aim is to understand the frequency of 551 in 55575524.

Let's proceed to step 1:
The number 551 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 551

Moving on to step 2:
551 can be fit into 55 0 times, resulting in a remainder of 55.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 55, we end up with 55.
Fetch the next digit (5) from the dividend, attach it to 55 and continue: 555 / 551

On to step 3:
555 divided by 551 is 1 with a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 551 from 555 to get 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 551

Step 4:
When dividing 47 by 551, we get 0 with a remainder of 47.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Deduct 0 from 47 and we're left with 47.
Append the next digit (5) from the dividend to 47 and continue with: 475 / 551

On to step 5:
The number 551 fits into 475 0 times, leaving a remainder of 475.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we subtract 0 from 475, we get 475.
Bring next digit (5) of the dividend behind the 475 and repeat the process: 4755 / 551

On to step 6:
If we divide 4755 by 551, we get 8 and a remainder of 347.
Put 8 as the next digit of the answer. 
Result so far: 1008.0
The remainder is 347 after subtracting 4408 from 4755.
Include the next digit (2) from the dividend after 347, then repeat: 3472 / 551

Let's proceed to step 7:
3472 divided by 551 is 6 with a remainder of 166.
The next digit of our result is 6. 
Result so far: 10086.0
Deduct 3306 from 3472 and we're left with 166.
Bring next digit (4) of the dividend behind the 166 and repeat the process: 1664 / 551

Step 8:
1664 divided by 551 is 3 with a remainder of 11.
The number 3 becomes the next digit in our result. 
Result so far: 100863.0
If we take 1653 away from 1664, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 9:
551 can be fit into 110 0 times, resulting in a remainder of 110.
Write down 0 as next digit of the result. 
Result so far: 100863.0
The remainder is 110 after subtracting 0 from 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 10:
1100 divided by 551 is 1 with a remainder of 549.
The number 1 becomes the next digit in our result. 
Result so far: 100863.01
If we subtract 551 from 1100, we get 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Advancing to step 11:
551 can be fit into 5490 9 times, resulting in a remainder of 531.
Use 9 as the next digit of our solution. 
Result so far: 100863.019
If we subtract 4959 from 5490, we get 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

On to step 12:
If we divide 5310 by 551, we get 9 and a remainder of 351.
Use 9 as the next digit of our solution. 
Result so far: 100863.0199
Subtracting 4959 from 5310 leaves us with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

After the division, we end up with 100863.0199 and a remainder of 0.00351.