We look at the division of 61705593 by 421 
The aim is to understand the frequency of 421 in 61705593.

On to step 1:
421 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 421

Step 2:
If we divide 61 by 421, we get 0 and a remainder of 61.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 61, we get 61.
Append the next digit (7) from the dividend to 61 and continue with: 617 / 421

Step 3:
421 can be fit into 617 1 times, resulting in a remainder of 196.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 196 after subtracting 421 from 617.
Append the next digit (0) from the dividend to 196 and continue with: 1960 / 421

Moving on to step 4:
1960 divided by 421 is 4 with a remainder of 276.
The next digit of our result is 4. 
Result so far: 14.0
Subtracting 1684 from 1960 leaves us with 276.
Append the next digit (5) from the dividend to 276 and continue with: 2765 / 421

Going ahead to step 5:
If we divide 2765 by 421, we get 6 and a remainder of 239.
Use 6 as the next digit of our solution. 
Result so far: 146.0
Subtracting 2526 from 2765 leaves us with 239.
Grab the next digit (5) from the dividend, add it to 239, then carry on: 2395 / 421

Let's proceed to step 6:
The number 421 fits into 2395 5 times, leaving a remainder of 290.
The number 5 becomes the next digit in our result. 
Result so far: 1465.0
The remainder is 290 after subtracting 2105 from 2395.
Include the next digit (9) from the dividend after 290, then repeat: 2909 / 421

Let's proceed to step 7:
If we divide 2909 by 421, we get 6 and a remainder of 383.
Write down 6 as next digit of the result. 
Result so far: 14656.0
Subtract 2526 from 2909 to get 383.
Grab the next digit (3) from the dividend, add it to 383, then carry on: 3833 / 421

Step 8:
421 can be fit into 3833 9 times, resulting in a remainder of 44.
The next digit of our result is 9. 
Result so far: 146569.0
The remainder is 44 after subtracting 3789 from 3833.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 9:
The number 421 fits into 440 1 times, leaving a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 146569.1
If we subtract 421 from 440, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 10:
When dividing 190 by 421, we get 0 with a remainder of 190.
The number 0 becomes the next digit in our result. 
Result so far: 146569.1
Subtract 0 from 190 to get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 11:
If we divide 1900 by 421, we get 4 and a remainder of 216.
The next digit of our result is 4. 
Result so far: 146569.104
The remainder is 216 after subtracting 1684 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Advancing to step 12:
2160 divided by 421 is 5 with a remainder of 55.
The number 5 becomes the next digit in our result. 
Result so far: 146569.1045
Subtracting 2105 from 2160 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 13:
421 can be fit into 550 1 times, resulting in a remainder of 129.
Write down 1 as next digit of the result. 
Result so far: 146569.10451
If we take 421 away from 550, we end up with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Moving on to step 14:
421 can be fit into 1290 3 times, resulting in a remainder of 27.
Record the quotient 3 as the next digit in the result. 
Result so far: 146569.104513
Deduct 1263 from 1290 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 15:
421 goes into 270 0 times with a remainder of 270.
Use 0 as the next digit of our solution. 
Result so far: 146569.104513
The remainder is 270 after subtracting 0 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Let's proceed to step 16:
2700 divided by 421 is 6 with a remainder of 174.
The next digit of our result is 6. 
Result so far: 146569.10451306
If we take 2526 away from 2700, we end up with 174.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

In conclusion, the division gives 146569.10451306 with a balance of 1.74e-07.