66210216 divided by 952 
The aim is to understand the frequency of 952 in 66210216.

Advancing to step 1:
When dividing 6 by 952, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 952

Going ahead to step 2:
952 goes into 66 0 times with a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Append the next digit (2) from the dividend to 66 and continue with: 662 / 952

Going ahead to step 3:
662 divided by 952 is 0 with a remainder of 662.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 662 and we're left with 662.
Include the next digit (1) from the dividend after 662, then repeat: 6621 / 952

On to step 4:
6621 divided by 952 is 6 with a remainder of 909.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 909 after subtracting 5712 from 6621.
Take the next digit (0) from the dividend and append it to 909, then repeat: 9090 / 952

Going ahead to step 5:
If we divide 9090 by 952, we get 9 and a remainder of 522.
The number 9 becomes the next digit in our result. 
Result so far: 69.0
Deduct 8568 from 9090 and we're left with 522.
Fetch the next digit (2) from the dividend, attach it to 522 and continue: 5222 / 952

Moving on to step 6:
The number 952 fits into 5222 5 times, leaving a remainder of 462.
Put 5 as the next digit of the answer. 
Result so far: 695.0
If we take 4760 away from 5222, we end up with 462.
Grab the next digit (1) from the dividend, add it to 462, then carry on: 4621 / 952

Step 7:
The number 952 fits into 4621 4 times, leaving a remainder of 813.
Write down 4 as next digit of the result. 
Result so far: 6954.0
Subtract 3808 from 4621 to get 813.
Bring next digit (6) of the dividend behind the 813 and repeat the process: 8136 / 952

On to step 8:
952 goes into 8136 8 times with a remainder of 520.
Use 8 as the next digit of our solution. 
Result so far: 69548.0
Subtracting 7616 from 8136 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

On to step 9:
952 can be fit into 5200 5 times, resulting in a remainder of 440.
Put 5 as the next digit of the answer. 
Result so far: 69548.5
If we subtract 4760 from 5200, we get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 10:
The number 952 fits into 4400 4 times, leaving a remainder of 592.
Write down 4 as next digit of the result. 
Result so far: 69548.54
If we subtract 3808 from 4400, we get 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Let's proceed to step 11:
952 goes into 5920 6 times with a remainder of 208.
Write down 6 as next digit of the result. 
Result so far: 69548.546
Subtracting 5712 from 5920 leaves us with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Moving on to step 12:
2080 divided by 952 is 2 with a remainder of 176.
Put 2 as the next digit of the answer. 
Result so far: 69548.5462
If we subtract 1904 from 2080, we get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 13:
1760 divided by 952 is 1 with a remainder of 808.
The next digit of our result is 1. 
Result so far: 69548.54621
The remainder is 808 after subtracting 952 from 1760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8080, and continue the process.

Advancing to step 14:
If we divide 8080 by 952, we get 8 and a remainder of 464.
The number 8 becomes the next digit in our result. 
Result so far: 69548.546218
Deduct 7616 from 8080 and we're left with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

On to step 15:
952 goes into 4640 4 times with a remainder of 832.
The next digit of our result is 4. 
Result so far: 69548.5462184
The remainder is 832 after subtracting 3808 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8320, and continue the process.

Moving on to step 16:
When dividing 8320 by 952, we get 8 with a remainder of 704.
The number 8 becomes the next digit in our result. 
Result so far: 69548.54621848
Subtract 7616 from 8320 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.

After the division, we end up with 69548.54621848 and a remainder of 7.04e-07.