52117031 divided by 643 
The aim is to understand the frequency of 643 in 52117031.

Step 1:
The number 643 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (2) of the dividend behind the 5 and repeat the process: 52 / 643

Let's proceed to step 2:
643 can be fit into 52 0 times, resulting in a remainder of 52.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 52 and we're left with 52.
Take the next digit (1) from the dividend and append it to 52, then repeat: 521 / 643

Moving on to step 3:
When dividing 521 by 643, we get 0 with a remainder of 521.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 521, we get 521.
Take the next digit (1) from the dividend and append it to 521, then repeat: 5211 / 643

Step 4:
When dividing 5211 by 643, we get 8 with a remainder of 67.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 5144 from 5211 to get 67.
Take the next digit (7) from the dividend and append it to 67, then repeat: 677 / 643

On to step 5:
If we divide 677 by 643, we get 1 and a remainder of 34.
Use 1 as the next digit of our solution. 
Result so far: 81.0
If we take 643 away from 677, we end up with 34.
Take the next digit (0) from the dividend and append it to 34, then repeat: 340 / 643

Step 6:
If we divide 340 by 643, we get 0 and a remainder of 340.
The number 0 becomes the next digit in our result. 
Result so far: 810.0
Subtracting 0 from 340 leaves us with 340.
Fetch the next digit (3) from the dividend, attach it to 340 and continue: 3403 / 643

Moving on to step 7:
If we divide 3403 by 643, we get 5 and a remainder of 188.
Write down 5 as next digit of the result. 
Result so far: 8105.0
Subtract 3215 from 3403 to get 188.
Append the next digit (1) from the dividend to 188 and continue with: 1881 / 643

Step 8:
643 can be fit into 1881 2 times, resulting in a remainder of 595.
The number 2 becomes the next digit in our result. 
Result so far: 81052.0
Deduct 1286 from 1881 and we're left with 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

Step 9:
The number 643 fits into 5950 9 times, leaving a remainder of 163.
Write down 9 as next digit of the result. 
Result so far: 81052.9
If we subtract 5787 from 5950, we get 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

On to step 10:
If we divide 1630 by 643, we get 2 and a remainder of 344.
The next digit of our result is 2. 
Result so far: 81052.92
Subtract 1286 from 1630 to get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Step 11:
3440 divided by 643 is 5 with a remainder of 225.
Use 5 as the next digit of our solution. 
Result so far: 81052.925
If we take 3215 away from 3440, we end up with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Advancing to step 12:
2250 divided by 643 is 3 with a remainder of 321.
Put 3 as the next digit of the answer. 
Result so far: 81052.9253
The remainder is 321 after subtracting 1929 from 2250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Step 13:
643 can be fit into 3210 4 times, resulting in a remainder of 638.
Write down 4 as next digit of the result. 
Result so far: 81052.92534
If we subtract 2572 from 3210, we get 638.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

Step 14:
643 goes into 6380 9 times with a remainder of 593.
Record the quotient 9 as the next digit in the result. 
Result so far: 81052.925349
If we take 5787 away from 6380, we end up with 593.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5930, and continue the process.

Moving on to step 15:
643 can be fit into 5930 9 times, resulting in a remainder of 143.
Write down 9 as next digit of the result. 
Result so far: 81052.9253499
Subtract 5787 from 5930 to get 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

The final result is 81052.9253499 with a remainder of 1.43e-06.