We look at the division of 84211611 by 553 
The aim is to understand the frequency of 553 in 84211611.

On to step 1:
If we divide 8 by 553, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 553

Going ahead to step 2:
553 goes into 84 0 times with a remainder of 84.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 84 to get 84.
Include the next digit (2) from the dividend after 84, then repeat: 842 / 553

Advancing to step 3:
The number 553 fits into 842 1 times, leaving a remainder of 289.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 289 after subtracting 553 from 842.
Grab the next digit (1) from the dividend, add it to 289, then carry on: 2891 / 553

Let's proceed to step 4:
The number 553 fits into 2891 5 times, leaving a remainder of 126.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we take 2765 away from 2891, we end up with 126.
Fetch the next digit (1) from the dividend, attach it to 126 and continue: 1261 / 553

On to step 5:
553 goes into 1261 2 times with a remainder of 155.
The number 2 becomes the next digit in our result. 
Result so far: 152.0
The remainder is 155 after subtracting 1106 from 1261.
Fetch the next digit (6) from the dividend, attach it to 155 and continue: 1556 / 553

Let's proceed to step 6:
The number 553 fits into 1556 2 times, leaving a remainder of 450.
Put 2 as the next digit of the answer. 
Result so far: 1522.0
Subtracting 1106 from 1556 leaves us with 450.
Take the next digit (1) from the dividend and append it to 450, then repeat: 4501 / 553

Going ahead to step 7:
The number 553 fits into 4501 8 times, leaving a remainder of 77.
Use 8 as the next digit of our solution. 
Result so far: 15228.0
The remainder is 77 after subtracting 4424 from 4501.
Bring next digit (1) of the dividend behind the 77 and repeat the process: 771 / 553

Going ahead to step 8:
When dividing 771 by 553, we get 1 with a remainder of 218.
The next digit of our result is 1. 
Result so far: 152281.0
If we subtract 553 from 771, we get 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Going ahead to step 9:
553 can be fit into 2180 3 times, resulting in a remainder of 521.
Write down 3 as next digit of the result. 
Result so far: 152281.3
Subtracting 1659 from 2180 leaves us with 521.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5210, and continue the process.

Moving on to step 10:
The number 553 fits into 5210 9 times, leaving a remainder of 233.
Put 9 as the next digit of the answer. 
Result so far: 152281.39
Subtracting 4977 from 5210 leaves us with 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Moving on to step 11:
If we divide 2330 by 553, we get 4 and a remainder of 118.
Record the quotient 4 as the next digit in the result. 
Result so far: 152281.394
If we take 2212 away from 2330, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 12:
553 can be fit into 1180 2 times, resulting in a remainder of 74.
Write down 2 as next digit of the result. 
Result so far: 152281.3942
If we subtract 1106 from 1180, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 13:
The number 553 fits into 740 1 times, leaving a remainder of 187.
Use 1 as the next digit of our solution. 
Result so far: 152281.39421
Subtracting 553 from 740 leaves us with 187.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1870, and continue the process.

Step 14:
The number 553 fits into 1870 3 times, leaving a remainder of 211.
Write down 3 as next digit of the result. 
Result so far: 152281.394213
If we take 1659 away from 1870, we end up with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Step 15:
If we divide 2110 by 553, we get 3 and a remainder of 451.
Put 3 as the next digit of the answer. 
Result so far: 152281.3942133
The remainder is 451 after subtracting 1659 from 2110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

The final outcome is 152281.3942133, with a leftover of 4.51e-06.