We look at the division of 71491641 by 497 
The aim is to understand the frequency of 497 in 71491641.

Going ahead to step 1:
When dividing 7 by 497, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 497

Let's proceed to step 2:
497 can be fit into 71 0 times, resulting in a remainder of 71.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 71 after subtracting 0 from 71.
Bring next digit (4) of the dividend behind the 71 and repeat the process: 714 / 497

Going ahead to step 3:
497 goes into 714 1 times with a remainder of 217.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 217 after subtracting 497 from 714.
Grab the next digit (9) from the dividend, add it to 217, then carry on: 2179 / 497

Going ahead to step 4:
The number 497 fits into 2179 4 times, leaving a remainder of 191.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 191 after subtracting 1988 from 2179.
Fetch the next digit (1) from the dividend, attach it to 191 and continue: 1911 / 497

Going ahead to step 5:
The number 497 fits into 1911 3 times, leaving a remainder of 420.
Record the quotient 3 as the next digit in the result. 
Result so far: 143.0
The remainder is 420 after subtracting 1491 from 1911.
Include the next digit (6) from the dividend after 420, then repeat: 4206 / 497

Step 6:
If we divide 4206 by 497, we get 8 and a remainder of 230.
Use 8 as the next digit of our solution. 
Result so far: 1438.0
If we take 3976 away from 4206, we end up with 230.
Grab the next digit (4) from the dividend, add it to 230, then carry on: 2304 / 497

Going ahead to step 7:
497 goes into 2304 4 times with a remainder of 316.
Use 4 as the next digit of our solution. 
Result so far: 14384.0
The remainder is 316 after subtracting 1988 from 2304.
Append the next digit (1) from the dividend to 316 and continue with: 3161 / 497

Advancing to step 8:
497 can be fit into 3161 6 times, resulting in a remainder of 179.
Use 6 as the next digit of our solution. 
Result so far: 143846.0
If we subtract 2982 from 3161, we get 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Going ahead to step 9:
If we divide 1790 by 497, we get 3 and a remainder of 299.
The number 3 becomes the next digit in our result. 
Result so far: 143846.3
The remainder is 299 after subtracting 1491 from 1790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Moving on to step 10:
The number 497 fits into 2990 6 times, leaving a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 143846.36
Deduct 2982 from 2990 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 11:
If we divide 80 by 497, we get 0 and a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 143846.36
Deduct 0 from 80 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 12:
497 can be fit into 800 1 times, resulting in a remainder of 303.
Use 1 as the next digit of our solution. 
Result so far: 143846.3601
Subtract 497 from 800 to get 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Moving on to step 13:
If we divide 3030 by 497, we get 6 and a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 143846.36016
Subtracting 2982 from 3030 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 14:
When dividing 480 by 497, we get 0 with a remainder of 480.
Use 0 as the next digit of our solution. 
Result so far: 143846.36016
If we take 0 away from 480, we end up with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 15:
4800 divided by 497 is 9 with a remainder of 327.
Use 9 as the next digit of our solution. 
Result so far: 143846.3601609
Subtract 4473 from 4800 to get 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

On to step 16:
3270 divided by 497 is 6 with a remainder of 288.
Write down 6 as next digit of the result. 
Result so far: 143846.36016096
Subtract 2982 from 3270 to get 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

After the division, we end up with 143846.36016096 and a remainder of 2.88e-07.