We look at the division of 1728601 by 497 
The aim is to understand the frequency of 497 in 1728601.

Advancing to step 1:
When dividing 1 by 497, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 497

Step 2:
17 divided by 497 is 0 with a remainder of 17.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 17 after subtracting 0 from 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 497

Moving on to step 3:
When dividing 172 by 497, we get 0 with a remainder of 172.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 172 to get 172.
Append the next digit (8) from the dividend to 172 and continue with: 1728 / 497

On to step 4:
The number 497 fits into 1728 3 times, leaving a remainder of 237.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 1491 from 1728 to get 237.
Bring next digit (6) of the dividend behind the 237 and repeat the process: 2376 / 497

Moving on to step 5:
2376 divided by 497 is 4 with a remainder of 388.
Record the quotient 4 as the next digit in the result. 
Result so far: 34.0
If we take 1988 away from 2376, we end up with 388.
Append the next digit (0) from the dividend to 388 and continue with: 3880 / 497

Advancing to step 6:
The number 497 fits into 3880 7 times, leaving a remainder of 401.
Put 7 as the next digit of the answer. 
Result so far: 347.0
Subtract 3479 from 3880 to get 401.
Bring next digit (1) of the dividend behind the 401 and repeat the process: 4011 / 497

On to step 7:
4011 divided by 497 is 8 with a remainder of 35.
Record the quotient 8 as the next digit in the result. 
Result so far: 3478.0
If we take 3976 away from 4011, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 8:
The number 497 fits into 350 0 times, leaving a remainder of 350.
Record the quotient 0 as the next digit in the result. 
Result so far: 3478.0
Deduct 0 from 350 and we're left with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 9:
When dividing 3500 by 497, we get 7 with a remainder of 21.
Write down 7 as next digit of the result. 
Result so far: 3478.07
Subtract 3479 from 3500 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 10:
When dividing 210 by 497, we get 0 with a remainder of 210.
Put 0 as the next digit of the answer. 
Result so far: 3478.07
If we subtract 0 from 210, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 11:
497 goes into 2100 4 times with a remainder of 112.
Record the quotient 4 as the next digit in the result. 
Result so far: 3478.0704
Subtract 1988 from 2100 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Going ahead to step 12:
The number 497 fits into 1120 2 times, leaving a remainder of 126.
Use 2 as the next digit of our solution. 
Result so far: 3478.07042
The remainder is 126 after subtracting 994 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Moving on to step 13:
The number 497 fits into 1260 2 times, leaving a remainder of 266.
Record the quotient 2 as the next digit in the result. 
Result so far: 3478.070422
If we take 994 away from 1260, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

After the division, we end up with 3478.070422 and a remainder of 2.66e-05.