We're dividing 73891521 by 553 
The aim is to understand the frequency of 553 in 73891521.

Moving on to step 1:
When dividing 7 by 553, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (3) from the dividend after 7, then repeat: 73 / 553

Step 2:
If we divide 73 by 553, we get 0 and a remainder of 73.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 73 to get 73.
Append the next digit (8) from the dividend to 73 and continue with: 738 / 553

Let's proceed to step 3:
The number 553 fits into 738 1 times, leaving a remainder of 185.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 553 from 738 leaves us with 185.
Grab the next digit (9) from the dividend, add it to 185, then carry on: 1859 / 553

On to step 4:
553 goes into 1859 3 times with a remainder of 200.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 1659 from 1859 and we're left with 200.
Grab the next digit (1) from the dividend, add it to 200, then carry on: 2001 / 553

Step 5:
If we divide 2001 by 553, we get 3 and a remainder of 342.
The next digit of our result is 3. 
Result so far: 133.0
Deduct 1659 from 2001 and we're left with 342.
Grab the next digit (5) from the dividend, add it to 342, then carry on: 3425 / 553

Advancing to step 6:
When dividing 3425 by 553, we get 6 with a remainder of 107.
The number 6 becomes the next digit in our result. 
Result so far: 1336.0
Subtract 3318 from 3425 to get 107.
Take the next digit (2) from the dividend and append it to 107, then repeat: 1072 / 553

Advancing to step 7:
553 can be fit into 1072 1 times, resulting in a remainder of 519.
The number 1 becomes the next digit in our result. 
Result so far: 13361.0
If we subtract 553 from 1072, we get 519.
Take the next digit (1) from the dividend and append it to 519, then repeat: 5191 / 553

Going ahead to step 8:
If we divide 5191 by 553, we get 9 and a remainder of 214.
Write down 9 as next digit of the result. 
Result so far: 133619.0
Subtract 4977 from 5191 to get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

Moving on to step 9:
553 can be fit into 2140 3 times, resulting in a remainder of 481.
Record the quotient 3 as the next digit in the result. 
Result so far: 133619.3
If we take 1659 away from 2140, we end up with 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

Going ahead to step 10:
If we divide 4810 by 553, we get 8 and a remainder of 386.
Put 8 as the next digit of the answer. 
Result so far: 133619.38
Subtracting 4424 from 4810 leaves us with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Let's proceed to step 11:
3860 divided by 553 is 6 with a remainder of 542.
Record the quotient 6 as the next digit in the result. 
Result so far: 133619.386
If we take 3318 away from 3860, we end up with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Let's proceed to step 12:
The number 553 fits into 5420 9 times, leaving a remainder of 443.
The number 9 becomes the next digit in our result. 
Result so far: 133619.3869
Subtract 4977 from 5420 to get 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

On to step 13:
The number 553 fits into 4430 8 times, leaving a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 133619.38698
Deduct 4424 from 4430 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 14:
If we divide 60 by 553, we get 0 and a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 133619.38698
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 15:
The number 553 fits into 600 1 times, leaving a remainder of 47.
Use 1 as the next digit of our solution. 
Result so far: 133619.3869801
The remainder is 47 after subtracting 553 from 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 16:
When dividing 470 by 553, we get 0 with a remainder of 470.
Record the quotient 0 as the next digit in the result. 
Result so far: 133619.3869801
Subtracting 0 from 470 leaves us with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Our division results in 133619.3869801 with a remaining 4.7e-07.