We look at the division of 21545228 by 972 
The aim is to understand the frequency of 972 in 21545228.

Moving on to step 1:
If we divide 2 by 972, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 972

Going ahead to step 2:
If we divide 21 by 972, we get 0 and a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (5) from the dividend, attach it to 21 and continue: 215 / 972

Moving on to step 3:
The number 972 fits into 215 0 times, leaving a remainder of 215.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 215, we get 215.
Append the next digit (4) from the dividend to 215 and continue with: 2154 / 972

Moving on to step 4:
2154 divided by 972 is 2 with a remainder of 210.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1944 from 2154 leaves us with 210.
Append the next digit (5) from the dividend to 210 and continue with: 2105 / 972

Moving on to step 5:
2105 divided by 972 is 2 with a remainder of 161.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Subtract 1944 from 2105 to get 161.
Bring next digit (2) of the dividend behind the 161 and repeat the process: 1612 / 972

On to step 6:
When dividing 1612 by 972, we get 1 with a remainder of 640.
The number 1 becomes the next digit in our result. 
Result so far: 221.0
If we subtract 972 from 1612, we get 640.
Take the next digit (2) from the dividend and append it to 640, then repeat: 6402 / 972

On to step 7:
972 can be fit into 6402 6 times, resulting in a remainder of 570.
Record the quotient 6 as the next digit in the result. 
Result so far: 2216.0
If we subtract 5832 from 6402, we get 570.
Bring next digit (8) of the dividend behind the 570 and repeat the process: 5708 / 972

Step 8:
When dividing 5708 by 972, we get 5 with a remainder of 848.
Use 5 as the next digit of our solution. 
Result so far: 22165.0
If we subtract 4860 from 5708, we get 848.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8480, and continue the process.

Moving on to step 9:
972 goes into 8480 8 times with a remainder of 704.
Use 8 as the next digit of our solution. 
Result so far: 22165.8
Subtract 7776 from 8480 to get 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Moving on to step 10:
If we divide 7040 by 972, we get 7 and a remainder of 236.
Record the quotient 7 as the next digit in the result. 
Result so far: 22165.87
Subtract 6804 from 7040 to get 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Advancing to step 11:
2360 divided by 972 is 2 with a remainder of 416.
Record the quotient 2 as the next digit in the result. 
Result so far: 22165.872
Subtract 1944 from 2360 to get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Going ahead to step 12:
When dividing 4160 by 972, we get 4 with a remainder of 272.
The next digit of our result is 4. 
Result so far: 22165.8724
Subtract 3888 from 4160 to get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

On to step 13:
972 goes into 2720 2 times with a remainder of 776.
Write down 2 as next digit of the result. 
Result so far: 22165.87242
Deduct 1944 from 2720 and we're left with 776.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7760, and continue the process.

Moving on to step 14:
7760 divided by 972 is 7 with a remainder of 956.
Record the quotient 7 as the next digit in the result. 
Result so far: 22165.872427
If we take 6804 away from 7760, we end up with 956.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9560, and continue the process.

Moving on to step 15:
The number 972 fits into 9560 9 times, leaving a remainder of 812.
Write down 9 as next digit of the result. 
Result so far: 22165.8724279
Subtracting 8748 from 9560 leaves us with 812.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8120, and continue the process.

Going ahead to step 16:
If we divide 8120 by 972, we get 8 and a remainder of 344.
The number 8 becomes the next digit in our result. 
Result so far: 22165.87242798
Subtract 7776 from 8120 to get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Our division results in 22165.87242798 with a remaining 3.44e-07.