We look at the division of 97472398 by 820 
The aim is to understand the frequency of 820 in 97472398.

Step 1:
The number 820 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (7) from the dividend, add it to 9, then carry on: 97 / 820

Let's proceed to step 2:
820 can be fit into 97 0 times, resulting in a remainder of 97.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 97, we end up with 97.
Take the next digit (4) from the dividend and append it to 97, then repeat: 974 / 820

Step 3:
The number 820 fits into 974 1 times, leaving a remainder of 154.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 820 away from 974, we end up with 154.
Take the next digit (7) from the dividend and append it to 154, then repeat: 1547 / 820

Moving on to step 4:
1547 divided by 820 is 1 with a remainder of 727.
The next digit of our result is 1. 
Result so far: 11.0
If we subtract 820 from 1547, we get 727.
Grab the next digit (2) from the dividend, add it to 727, then carry on: 7272 / 820

Moving on to step 5:
The number 820 fits into 7272 8 times, leaving a remainder of 712.
The next digit of our result is 8. 
Result so far: 118.0
If we subtract 6560 from 7272, we get 712.
Fetch the next digit (3) from the dividend, attach it to 712 and continue: 7123 / 820

Going ahead to step 6:
7123 divided by 820 is 8 with a remainder of 563.
The next digit of our result is 8. 
Result so far: 1188.0
Deduct 6560 from 7123 and we're left with 563.
Fetch the next digit (9) from the dividend, attach it to 563 and continue: 5639 / 820

Advancing to step 7:
820 can be fit into 5639 6 times, resulting in a remainder of 719.
The next digit of our result is 6. 
Result so far: 11886.0
If we subtract 4920 from 5639, we get 719.
Grab the next digit (8) from the dividend, add it to 719, then carry on: 7198 / 820

Going ahead to step 8:
820 can be fit into 7198 8 times, resulting in a remainder of 638.
Record the quotient 8 as the next digit in the result. 
Result so far: 118868.0
Subtract 6560 from 7198 to 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.

Moving on to step 9:
The number 820 fits into 6380 7 times, leaving a remainder of 640.
Record the quotient 7 as the next digit in the result. 
Result so far: 118868.7
Subtracting 5740 from 6380 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 10:
6400 divided by 820 is 7 with a remainder of 660.
Put 7 as the next digit of the answer. 
Result so far: 118868.77
Subtracting 5740 from 6400 leaves us with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

The final outcome is 118868.77, with a leftover of 0.66.