We're dividing 7708421 by 212 
The aim is to understand the frequency of 212 in 7708421.

Advancing to step 1:
If we divide 7 by 212, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 212

Step 2:
The number 212 fits into 77 0 times, leaving a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Fetch the next digit (0) from the dividend, attach it to 77 and continue: 770 / 212

Let's proceed to step 3:
When dividing 770 by 212, we get 3 with a remainder of 134.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 636 from 770 and we're left with 134.
Include the next digit (8) from the dividend after 134, then repeat: 1348 / 212

Advancing to step 4:
212 can be fit into 1348 6 times, resulting in a remainder of 76.
Put 6 as the next digit of the answer. 
Result so far: 36.0
Subtracting 1272 from 1348 leaves us with 76.
Bring next digit (4) of the dividend behind the 76 and repeat the process: 764 / 212

Step 5:
If we divide 764 by 212, we get 3 and a remainder of 128.
Write down 3 as next digit of the result. 
Result so far: 363.0
If we subtract 636 from 764, we get 128.
Bring next digit (2) of the dividend behind the 128 and repeat the process: 1282 / 212

Going ahead to step 6:
212 can be fit into 1282 6 times, resulting in a remainder of 10.
The next digit of our result is 6. 
Result so far: 3636.0
If we take 1272 away from 1282, we end up with 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 212

Going ahead to step 7:
101 divided by 212 is 0 with a remainder of 101.
Write down 0 as next digit of the result. 
Result so far: 36360.0
Subtract 0 from 101 to get 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

On to step 8:
When dividing 1010 by 212, we get 4 with a remainder of 162.
The next digit of our result is 4. 
Result so far: 36360.4
If we subtract 848 from 1010, we get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Moving on to step 9:
When dividing 1620 by 212, we get 7 with a remainder of 136.
The next digit of our result is 7. 
Result so far: 36360.47
Deduct 1484 from 1620 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 10:
212 can be fit into 1360 6 times, resulting in a remainder of 88.
Use 6 as the next digit of our solution. 
Result so far: 36360.476
Subtract 1272 from 1360 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 11:
880 divided by 212 is 4 with a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 36360.4764
Subtract 848 from 880 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
When dividing 320 by 212, we get 1 with a remainder of 108.
Use 1 as the next digit of our solution. 
Result so far: 36360.47641
If we take 212 away from 320, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 13:
The number 212 fits into 1080 5 times, leaving a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 36360.476415
Subtracting 1060 from 1080 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
The number 212 fits into 200 0 times, leaving a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 36360.476415
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 15:
212 goes into 2000 9 times with a remainder of 92.
The next digit of our result is 9. 
Result so far: 36360.47641509
The remainder is 92 after subtracting 1908 from 2000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

The final outcome is 36360.47641509, with a leftover of 9.2e-08.