We're dividing 50225063 by 643 
The aim is to understand the frequency of 643 in 50225063.

Advancing to step 1:
5 divided by 643 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 643

Going ahead to step 2:
643 can be fit into 50 0 times, resulting in a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 50 leaves us with 50.
Fetch the next digit (2) from the dividend, attach it to 50 and continue: 502 / 643

On to step 3:
502 divided by 643 is 0 with a remainder of 502.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 502, we end up with 502.
Include the next digit (2) from the dividend after 502, then repeat: 5022 / 643

Step 4:
5022 divided by 643 is 7 with a remainder of 521.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 4501 from 5022 leaves us with 521.
Grab the next digit (5) from the dividend, add it to 521, then carry on: 5215 / 643

Step 5:
643 can be fit into 5215 8 times, resulting in a remainder of 71.
Put 8 as the next digit of the answer. 
Result so far: 78.0
Deduct 5144 from 5215 and we're left with 71.
Fetch the next digit (0) from the dividend, attach it to 71 and continue: 710 / 643

On to step 6:
When dividing 710 by 643, we get 1 with a remainder of 67.
The next digit of our result is 1. 
Result so far: 781.0
The remainder is 67 after subtracting 643 from 710.
Include the next digit (6) from the dividend after 67, then repeat: 676 / 643

Let's proceed to step 7:
The number 643 fits into 676 1 times, leaving a remainder of 33.
Write down 1 as next digit of the result. 
Result so far: 7811.0
If we subtract 643 from 676, we get 33.
Take the next digit (3) from the dividend and append it to 33, then repeat: 333 / 643

Step 8:
The number 643 fits into 333 0 times, leaving a remainder of 333.
The next digit of our result is 0. 
Result so far: 78110.0
Subtracting 0 from 333 leaves us with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Advancing to step 9:
643 goes into 3330 5 times with a remainder of 115.
Write down 5 as next digit of the result. 
Result so far: 78110.5
The remainder is 115 after subtracting 3215 from 3330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Moving on to step 10:
1150 divided by 643 is 1 with a remainder of 507.
Use 1 as the next digit of our solution. 
Result so far: 78110.51
Deduct 643 from 1150 and we're left with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Let's proceed to step 11:
If we divide 5070 by 643, we get 7 and a remainder of 569.
Use 7 as the next digit of our solution. 
Result so far: 78110.517
If we subtract 4501 from 5070, we get 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

Going ahead to step 12:
When dividing 5690 by 643, we get 8 with a remainder of 546.
The number 8 becomes the next digit in our result. 
Result so far: 78110.5178
If we take 5144 away from 5690, we end up with 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

Moving on to step 13:
If we divide 5460 by 643, we get 8 and a remainder of 316.
Put 8 as the next digit of the answer. 
Result so far: 78110.51788
Subtracting 5144 from 5460 leaves us with 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

The final result is 78110.51788 with a remainder of 0.000316.