We look at the division of 53788921 by 653 
The aim is to understand the frequency of 653 in 53788921.

Going ahead to step 1:
The number 653 fits into 5 0 times, leaving a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 653

Going ahead to step 2:
If we divide 53 by 653, we get 0 and a remainder of 53.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Append the next digit (7) from the dividend to 53 and continue with: 537 / 653

Advancing to step 3:
537 divided by 653 is 0 with a remainder of 537.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 537, we get 537.
Bring next digit (8) of the dividend behind the 537 and repeat the process: 5378 / 653

Step 4:
If we divide 5378 by 653, we get 8 and a remainder of 154.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 5224 from 5378 to get 154.
Bring next digit (8) of the dividend behind the 154 and repeat the process: 1548 / 653

Let's proceed to step 5:
When dividing 1548 by 653, we get 2 with a remainder of 242.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
Deduct 1306 from 1548 and we're left with 242.
Include the next digit (9) from the dividend after 242, then repeat: 2429 / 653

Advancing to step 6:
The number 653 fits into 2429 3 times, leaving a remainder of 470.
Use 3 as the next digit of our solution. 
Result so far: 823.0
Deduct 1959 from 2429 and we're left with 470.
Take the next digit (2) from the dividend and append it to 470, then repeat: 4702 / 653

On to step 7:
When dividing 4702 by 653, we get 7 with a remainder of 131.
The number 7 becomes the next digit in our result. 
Result so far: 8237.0
Deduct 4571 from 4702 and we're left with 131.
Include the next digit (1) from the dividend after 131, then repeat: 1311 / 653

Moving on to step 8:
653 goes into 1311 2 times with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 82372.0
Subtracting 1306 from 1311 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
If we divide 50 by 653, we get 0 and a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 82372.0
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
653 can be fit into 500 0 times, resulting in a remainder of 500.
Put 0 as the next digit of the answer. 
Result so far: 82372.0
If we subtract 0 from 500, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

After the division, we end up with 82372.0 and a remainder of 0.5.