45721901 ÷ 490 
The aim is to understand the frequency of 490 in 45721901.

On to step 1:
490 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 490

Going ahead to step 2:
490 can be fit into 45 0 times, resulting in a remainder of 45.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 45 leaves us with 45.
Bring next digit (7) of the dividend behind the 45 and repeat the process: 457 / 490

Step 3:
The number 490 fits into 457 0 times, leaving a remainder of 457.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 457 and we're left with 457.
Append the next digit (2) from the dividend to 457 and continue with: 4572 / 490

Advancing to step 4:
490 can be fit into 4572 9 times, resulting in a remainder of 162.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 4410 away from 4572, we end up with 162.
Fetch the next digit (1) from the dividend, attach it to 162 and continue: 1621 / 490

Going ahead to step 5:
490 can be fit into 1621 3 times, resulting in a remainder of 151.
Write down 3 as next digit of the result. 
Result so far: 93.0
If we subtract 1470 from 1621, we get 151.
Append the next digit (9) from the dividend to 151 and continue with: 1519 / 490

Step 6:
490 can be fit into 1519 3 times, resulting in a remainder of 49.
Record the quotient 3 as the next digit in the result. 
Result so far: 933.0
If we take 1470 away from 1519, we end up with 49.
Take the next digit (0) from the dividend and append it to 49, then repeat: 490 / 490

Advancing to step 7:
The number 490 fits into 490 1 times, leaving a remainder of 0.
The next digit of our result is 1. 
Result so far: 9331.0
Deduct 490 from 490 and we're left with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 490

Moving on to step 8:
When dividing 1 by 490, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 93310.0
Subtract 0 from 1 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
If we divide 10 by 490, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 93310.0
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
If we divide 100 by 490, we get 0 and a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 93310.0
If we take 0 away from 100, we end up with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final result is 93310.0 with a remainder of 0.1.